diff --git a/src/allmain.c b/src/allmain.c
index 9e40a6a91..9f8430dbd 100644
--- a/src/allmain.c
+++ b/src/allmain.c
@@ -26,9 +26,15 @@ staticfn void debug_fields(const char *);
 staticfn void dump_enums(void);
 #endif
 
+#ifdef CRASHREPORT
+#define USED_FOR_CRASHREPORT
+#else
+#define USED_FOR_CRASHREPORT UNUSED
+#endif
+
 /*ARGSUSED*/
 void
-early_init(int argc UNUSED, char *argv[] UNUSED)
+early_init(int argc USED_FOR_CRASHREPORT, char *argv[] USED_FOR_CRASHREPORT)
 {
 #ifdef CRASHREPORT
     /* Do this as early as possible, but let ports do other things first. */
diff --git a/src/botl.c b/src/botl.c
index c5ff5156e..07579358a 100644
--- a/src/botl.c
+++ b/src/botl.c
@@ -1370,7 +1370,7 @@ evaluate_and_notify_windowport(
     boolean *valsetlist,
     int idx)
 {
-    int i, fld, updated = 0, notpresent UNUSED = 0;
+    int i, fld, updated = 0;
 
     /*
      *  Now pass the changed values to window port.
@@ -1384,7 +1384,6 @@ evaluate_and_notify_windowport(
             || ((fld == BL_XP || i == BL_EXP) && Upolyd)
             || ((fld == BL_VERS) && !flags.showvers)
             ) {
-            notpresent++;
             continue;
         }
         if (eval_notify_windowport_field(fld, valsetlist, idx))
diff --git a/src/invent.c b/src/invent.c
index baee7a1c1..9cd06a2e4 100644
--- a/src/invent.c
+++ b/src/invent.c
@@ -2048,11 +2048,7 @@ DISABLE_WARNING_FORMAT_NONLITERAL
 
 void
 silly_thing(const char *word,
-#ifdef OBSOLETE_HANDLING
             struct obj *otmp)
-#else
-            struct obj *otmp UNUSED)
-#endif
 {
 #ifdef OBSOLETE_HANDLING
     /* 'P','R' vs 'W','T' handling is obsolete */
diff --git a/src/music.c b/src/music.c
index 65d153b9f..ce4510321 100644
--- a/src/music.c
+++ b/src/music.c
@@ -487,7 +487,7 @@ do_improvisation(struct obj *instr)
     struct obj itmp;
     boolean mundane = FALSE, same_old_song = FALSE;
     static char my_goto_song[] = {'C', '\0'},
-                *improvisation SOUNDLIBONLY = my_goto_song;
+                *improvisation = my_goto_song;
 
     itmp = *instr;
     itmp.oextra = (struct oextra *) 0; /* ok on this copy as instr maintains
@@ -706,6 +706,7 @@ do_improvisation(struct obj *instr)
         impossible("What a weird instrument (%d)!", instr->otyp);
         return 0;
     }
+    nhUse(improvisation);
     return 2; /* That takes time */
 }
 
diff --git a/src/options.c b/src/options.c
index d631ca3f1..ccd541fed 100644
--- a/src/options.c
+++ b/src/options.c
@@ -1970,7 +1970,7 @@ optfn_map_mode(int optidx, int req, boolean negated, char *opts, char *op)
 /* all the key assignment options for menu_* commands are identical
    but optlist.h treats them as distinct rather than sharing one */
 staticfn int
-shared_menu_optfn(int optidx UNUSED, int req, boolean negated UNUSED,
+shared_menu_optfn(int optidx UNUSED, int req, boolean negated,
                    char *opts, char *op)
 {
     if (req == do_init) {
@@ -3969,7 +3969,7 @@ extern const char *const known_restrictions[]; /* symbols.c */
 
 staticfn int
 optfn_symset(
-    int optidx UNUSED,
+    int optidx,
     int req,
     boolean negated UNUSED,
     char *opts,
@@ -8621,7 +8621,7 @@ doset(void) /* changing options via menu by Per Liboriussen */
                 (void) parseoptions(buf, setinitial, fromfile);
             } else {
                 /* compound option */
-                int k = opt_indx, reslt UNUSED;
+                int k = opt_indx, reslt;
 
                 if (allopt[k].has_handler && allopt[k].optfn) {
                     reslt = (*allopt[k].optfn)(allopt[k].idx, do_handler,
diff --git a/src/sp_lev.c b/src/sp_lev.c
index 8ea15c0d7..444407e63 100644
--- a/src/sp_lev.c
+++ b/src/sp_lev.c
@@ -5890,7 +5890,7 @@ lspo_wallify(lua_State *L)
 
 /* reset_level is only needed for testing purposes */
 int
-lspo_reset_level(lua_State *L UNUSED)
+lspo_reset_level(lua_State *L)
 {
     boolean wtower = In_W_tower(u.ux, u.uy, &u.uz);
 
@@ -5906,7 +5906,7 @@ lspo_reset_level(lua_State *L UNUSED)
 
 /* finalize_level is only needed for testing purposes */
 int
-lspo_finalize_level(lua_State *L UNUSED)
+lspo_finalize_level(lua_State *L)
 {
     boolean wtower = In_W_tower(u.ux, u.uy, &u.uz);
     int i;
diff --git a/src/uhitm.c b/src/uhitm.c
index 3c01e7258..2fdb59841 100644
--- a/src/uhitm.c
+++ b/src/uhitm.c
@@ -3724,7 +3724,7 @@ mhitm_ad_pest(
 void
 mhitm_ad_deth(
     struct monst *magr,
-    struct attack *mattk UNUSED,
+    struct attack *mattk,
     struct monst *mdef, struct mhitm_data *mhm)
 {
     struct permonst *pd = mdef->data;
@@ -3831,7 +3831,7 @@ do_stone_u(struct monst *mtmp)
 void
 do_stone_mon(
     struct monst *magr,
-    struct attack *mattk UNUSED,
+    struct attack *mattk,
     struct monst *mdef, struct mhitm_data *mhm)
 {
     struct permonst *pd = mdef->data;
diff --git a/util/makedefs.c b/util/makedefs.c
index d9ce2225b..9e58c3832 100644
--- a/util/makedefs.c
+++ b/util/makedefs.c
@@ -2176,7 +2176,7 @@ macronamelimit(char *name, int pref)
 void
 do_objs(void)
 {
-    int i, sum UNUSED = 0;
+    int i /*, sum = 0 */;
     char *c, *objnam;
     int nspell = 0;
     int prefix = 0;
@@ -2216,7 +2216,7 @@ do_objs(void)
             }
 #endif /*0*/
             class = objects[i].oc_class;
-            sum = 0;
+            /* sum = 0; */
         }
 
         for (c = objnam; *c; c++)
@@ -2289,7 +2289,7 @@ do_objs(void)
             Fprintf(ofp, "%s\t%d\n", macronamelimit(objnam, prefix), i);
         prefix = 0;
 
-        sum += objects[i].oc_prob;
+        /* sum += objects[i].oc_prob; */
 
         if (sumerr)
             break;
diff --git a/win/curses/cursinit.c b/win/curses/cursinit.c
index 9b2380bb4..196a56c18 100644
--- a/win/curses/cursinit.c
+++ b/win/curses/cursinit.c
@@ -99,7 +99,7 @@ set_window_position(int *winx, int *winy, int *winw, int *winh,
 void
 curses_create_main_windows(void)
 {
-    int min_message_height UNUSED = 1;
+    /* int min_message_height = 1; */
     int message_orientation = 0;
     int status_orientation = 0;
     int border_space = 0;
@@ -133,7 +133,7 @@ curses_create_main_windows(void)
     }
 
     if ((term_cols - border_space) < COLNO) {
-        min_message_height++;
+        /* min_message_height++; */
     }
 
     /* Determine status window orientation */
diff --git a/win/curses/cursstat.c b/win/curses/cursstat.c
index 3f53fd103..c7258d6b9 100644
--- a/win/curses/cursstat.c
+++ b/win/curses/cursstat.c
@@ -301,7 +301,7 @@ draw_horizontal(boolean border)
         cap_and_hunger, exp_points, sho_score, sho_vers,
         /* both height and width get their values set,
          * but only width gets used in this function */
-        height UNUSED, width, w, xtra, clen, x, y, t, ex, ey,
+        height, width, w, xtra, clen, x, y, t, ex, ey,
         condstart = 0, conddummy = 0, versstart = 0;
 #ifdef STATUS_HILITES
     int coloridx = NO_COLOR, attrmask = 0;
@@ -672,6 +672,7 @@ draw_horizontal(boolean border)
         } /* i (fld) */
         wclrtoeol(win); /* [superfluous? draw_status() calls werase()] */
     } /* j (line) */
+    nhUse(height);
     return;
 }