diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index e1db1cd85..151b25f5a 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -3004,7 +3004,6 @@ such as ``paranoid_confirmation:attack pray Remove''.
 .lp perm_invent
 If true, always display your current inventory in a window.  This only
 makes sense for windowing system interfaces that implement this feature.
-Persistent.
 .lp pettype
 Specify the type of your initial pet, if you are playing a character class
 that uses multiple types of pets; or choose to have no initial pet at all.
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index 7cc9b7de6..4d3352d84 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -3501,7 +3501,6 @@ such as ``{\it par\-a\-noid\verb+_+con\-fir\-ma\-tion:attack~pray~Remove}''.
 \item[\ib{perm\verb+_+invent}]
 If true, always display your current inventory in a window.  This only
 makes sense for windowing system interfaces that implement this feature.
-Persistent.
 %.lp
 \item[\ib{pettype}]
 Specify the type of your initial pet, if you are playing a character class
diff --git a/doc/fixes36.2 b/doc/fixes36.2
index a8202713e..3454dda9e 100644
--- a/doc/fixes36.2
+++ b/doc/fixes36.2
@@ -136,6 +136,8 @@ tty: ensure that current status fields are always copied to prior status
 
 Platform- and/or Interface-Specific Fixes
 -----------------------------------------
+move 'perm_invent' value from flags to iflags to keep it out of save files;
+	affects X11, win32, and curses
 windows-gui: In nethackw, there could be conflicts between menu accelerators 
 	and an extra choice accelerator to fix H7132.
 windows-gui: recognize new BL_RESET in status_update; no change in behavior yet
diff --git a/include/flag.h b/include/flag.h
index 8d386decf..f2339f6c0 100644
--- a/include/flag.h
+++ b/include/flag.h
@@ -40,7 +40,7 @@ struct flag {
     boolean lit_corridor;    /* show a dark corr as lit if it is in sight */
     boolean nap;             /* `timed_delay' option for display effects */
     boolean null;            /* OK to send nulls to the terminal */
-    boolean perm_invent;     /* keep full inventories up until dismissed */
+    boolean p__obsolete;     /* [3.6.2: perm_invent moved to iflags] */
     boolean pickup;          /* whether you pickup or move and look */
     boolean pickup_thrown;   /* auto-pickup items you threw */
     boolean pushweapon; /* When wielding, push old weapon into second slot */
@@ -292,6 +292,7 @@ struct instance_flags {
     boolean menu_tab_sep;     /* Use tabs to separate option menu fields */
     boolean news;             /* print news */
     boolean num_pad;          /* use numbers for movement commands */
+    boolean perm_invent;      /* keep full inventories up until dismissed */
     boolean renameallowed;    /* can change hero name during role selection */
     boolean renameinprogress; /* we are changing hero name */
     boolean status_updates;   /* allow updates to bottom status lines;
diff --git a/src/end.c b/src/end.c
index 4d176323b..fd5d73db9 100644
--- a/src/end.c
+++ b/src/end.c
@@ -1280,7 +1280,7 @@ int how;
         if (WIN_INVEN != WIN_ERR) {
             destroy_nhwindow(WIN_INVEN),  WIN_INVEN = WIN_ERR;
             /* precaution in case any late update_inventory() calls occur */
-            flags.perm_invent = 0;
+            iflags.perm_invent = 0;
         }
         display_nhwindow(WIN_MESSAGE, TRUE);
         destroy_nhwindow(WIN_MAP),  WIN_MAP = WIN_ERR;
diff --git a/src/invent.c b/src/invent.c
index 25280839b..4262a5153 100644
--- a/src/invent.c
+++ b/src/invent.c
@@ -2511,7 +2511,7 @@ long *out_cnt;
     if (lets && !*lets)
         lets = 0; /* simplify tests: (lets) instead of (lets && *lets) */
 
-    if (flags.perm_invent && (lets || xtra_choice)) {
+    if (iflags.perm_invent && (lets || xtra_choice)) {
         /* partial inventory in perm_invent setting; don't operate on
            full inventory window, use an alternate one instead; create
            the first time needed and keep it for re-use as needed later */
@@ -2536,7 +2536,7 @@ long *out_cnt;
      * more than 1; for the last one, we don't need a precise number.
      * For perm_invent update we force 'more than 1'.
      */
-    n = (flags.perm_invent && !lets && !want_reply) ? 2
+    n = (iflags.perm_invent && !lets && !want_reply) ? 2
         : lets ? (int) strlen(lets)
                : !invent ? 0 : !invent->nobj ? 1 : 2;
     /* for xtra_choice, there's another 'item' not included in initial 'n';
@@ -2670,7 +2670,7 @@ nextclass:
        nothing has been listed (because there isn't anyhing to list;
        recognized via any.a_char still being zero; the n==0 case above
        gets skipped for perm_invent), put something into the menu */
-    if (flags.perm_invent && !lets && !any.a_char) {
+    if (iflags.perm_invent && !lets && !any.a_char) {
         any = zeroany;
         add_menu(win, NO_GLYPH, &any, 0, 0, 0,
                  not_carrying_anything, MENU_UNSELECTED);
diff --git a/src/options.c b/src/options.c
index a283f4283..490d68a0a 100644
--- a/src/options.c
+++ b/src/options.c
@@ -173,7 +173,8 @@ static struct Bool_Opt {
 #else
     { "page_wait", (boolean *) 0, FALSE, SET_IN_FILE },
 #endif
-    { "perm_invent", &flags.perm_invent, FALSE, SET_IN_GAME },
+    /* 3.6.2: move perm_invent from flags to inflags and out of save file */
+    { "perm_invent", &iflags.perm_invent, FALSE, SET_IN_GAME },
     { "pickup_thrown", &flags.pickup_thrown, TRUE, SET_IN_GAME },
     { "popup_dialog", &iflags.wc_popup_dialog, FALSE, SET_IN_GAME },   /*WC*/
     { "preload_tiles", &iflags.wc_preload_tiles, TRUE, DISP_IN_GAME }, /*WC*/
diff --git a/src/restore.c b/src/restore.c
index f7e92da76..f638875b8 100644
--- a/src/restore.c
+++ b/src/restore.c
@@ -543,9 +543,12 @@ unsigned int *stuckid, *steedid;
     /* avoid keeping permanent inventory window up to date during restore
        (setworn() calls update_inventory); attempting to include the cost
        of unpaid items before shopkeeper's bill is available is a no-no;
-       named fruit names aren't accessible yet either */
-    defer_perm_invent = flags.perm_invent;
-    flags.perm_invent = FALSE;
+       named fruit names aren't accessible yet either
+       [3.6.2: moved perm_invent from flags to iflags to keep it out of
+       save files; retaining the override here is simpler than trying to
+       to figure out where it really belongs now] */
+    defer_perm_invent = iflags.perm_invent;
+    iflags.perm_invent = FALSE;
     /* wizard and discover are actually flags.debug and flags.explore;
        player might be overriding the save file values for them;
        in the discover case, we don't want to set that for a normal
@@ -595,6 +598,7 @@ unsigned int *stuckid, *steedid;
         u.uz.dlevel = 1;
         /* revert to pre-restore option settings */
         iflags.deferred_X = FALSE;
+        iflags.perm_invent = defer_perm_invent;
         flags = newgameflags;
 #ifdef SYSFLAGS
         sysflags = newgamesysflags;
@@ -672,7 +676,7 @@ unsigned int *stuckid, *steedid;
     relink_timers(FALSE);
     relink_light_sources(FALSE);
     /* inventory display is now viable */
-    flags.perm_invent = defer_perm_invent;
+    iflags.perm_invent = defer_perm_invent;
     return TRUE;
 }
 
diff --git a/win/X11/winmenu.c b/win/X11/winmenu.c
index 75c99b57a..a3287737c 100644
--- a/win/X11/winmenu.c
+++ b/win/X11/winmenu.c
@@ -826,7 +826,7 @@ menu_item **menu_list;
      * each time.
      */
     if (menu_info->valid_widgets
-        && (window != WIN_INVEN || !flags.perm_invent)) {
+        && (window != WIN_INVEN || !iflags.perm_invent)) {
         XtDestroyWidget(wp->popup);
         menu_info->valid_widgets = FALSE;
         menu_info->is_up = FALSE;
diff --git a/win/win32/mhmain.c b/win/win32/mhmain.c
index 6c6bfea7d..41e7733fa 100644
--- a/win/win32/mhmain.c
+++ b/win/win32/mhmain.c
@@ -700,7 +700,7 @@ mswin_layout_main_window(HWND changed_child)
         GetNHApp()->rtInvenWindow.bottom = GetNHApp()->rtMenuWindow.bottom;
 
         /* adjust map window size only if perm_invent is set */
-        if (flags.perm_invent)
+        if (iflags.perm_invent)
             GetNHApp()->rtMapWindow.right = GetNHApp()->rtMenuWindow.left;
     }
 
@@ -712,7 +712,7 @@ mswin_layout_main_window(HWND changed_child)
             /* kludge - inventory window should have its own type (same as
                menu-text
                as a matter of fact) */
-            if (flags.perm_invent && i == WIN_INVEN) {
+            if (iflags.perm_invent && i == WIN_INVEN) {
                 mswin_get_window_placement(NHW_INVEN, &rt);
             } else {
                 mswin_get_window_placement(GetNHApp()->windowlist[i].type,
diff --git a/win/win32/mhmenu.c b/win/win32/mhmenu.c
index c8d71b4e6..6b0b4fda2 100644
--- a/win/win32/mhmenu.c
+++ b/win/win32/mhmenu.c
@@ -251,7 +251,7 @@ mswin_menu_window_select_menu(HWND hWnd, int how, MENU_ITEM_P **_selected,
         /* If we just used the permanent inventory window to pick something,
          * set the menu back to its display inventory state.
          */
-        if (flags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN
+        if (iflags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN
             && how != PICK_NONE) {
             data->menu.prompt[0] = '\0';
             SetMenuListType(hWnd, PICK_NONE);
@@ -322,7 +322,7 @@ MenuWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
         GetWindowRect(hWnd, &rt);
         ScreenToClient(GetNHApp()->hMainWnd, (LPPOINT) &rt);
         ScreenToClient(GetNHApp()->hMainWnd, ((LPPOINT) &rt) + 1);
-        if (flags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN)
+        if (iflags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN)
             mswin_update_window_placement(NHW_INVEN, &rt);
         else
             mswin_update_window_placement(NHW_MENU, &rt);
@@ -334,7 +334,7 @@ MenuWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
         GetWindowRect(hWnd, &rt);
         ScreenToClient(GetNHApp()->hMainWnd, (LPPOINT) &rt);
         ScreenToClient(GetNHApp()->hMainWnd, ((LPPOINT) &rt) + 1);
-        if (flags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN)
+        if (iflags.perm_invent && mswin_winid_from_handle(hWnd) == WIN_INVEN)
             mswin_update_window_placement(NHW_INVEN, &rt);
         else
             mswin_update_window_placement(NHW_MENU, &rt);
diff --git a/win/win32/mswproc.c b/win/win32/mswproc.c
index feabf49b2..ce9b14d5f 100644
--- a/win/win32/mswproc.c
+++ b/win/win32/mswproc.c
@@ -1194,7 +1194,7 @@ mswin_select_menu(winid wid, int how, MENU_ITEM_P **selected)
         ShowWindow(GetNHApp()->windowlist[wid].win, SW_SHOW);
         nReturned = mswin_menu_window_select_menu(
             GetNHApp()->windowlist[wid].win, how, selected,
-            !(flags.perm_invent && wid == WIN_INVEN
+            !(iflags.perm_invent && wid == WIN_INVEN
               && how == PICK_NONE) /* don't activate inventory window if
                                       perm_invent is on */
             );
@@ -1211,7 +1211,7 @@ void
 mswin_update_inventory()
 {
     logDebug("mswin_update_inventory()\n");
-    if (flags.perm_invent && program_state.something_worth_saving
+    if (iflags.perm_invent && program_state.something_worth_saving
         && iflags.window_inited && WIN_INVEN != WIN_ERR)
         display_inventory(NULL, FALSE);
 }
@@ -2243,7 +2243,7 @@ mswin_popup_destroy(HWND hWnd)
     DrawMenuBar(GetNHApp()->hMainWnd);
 
     /* Don't hide the permanent inventory window ... leave it showing */
-    if (!flags.perm_invent || mswin_winid_from_handle(hWnd) != WIN_INVEN)
+    if (!iflags.perm_invent || mswin_winid_from_handle(hWnd) != WIN_INVEN)
         ShowWindow(hWnd, SW_HIDE);
 
     GetNHApp()->hPopupWnd = NULL;