diff --git a/win/win32/mhmsg.h b/win/win32/mhmsg.h
index 8030b4391..8e48a3b01 100644
--- a/win/win32/mhmsg.h
+++ b/win/win32/mhmsg.h
@@ -28,9 +28,9 @@ typedef struct mswin_nhmsg_add_wnd {
 } MSNHMsgAddWnd, *PMSNHMsgAddWnd;
 
 typedef struct mswin_nhmsg_putstr {
-  int		  attr;
-  const char* text;
-  boolean	  append;
+  int			attr;
+  const char*		text;
+  int			append;
 } MSNHMsgPutstr, *PMSNHMsgPutstr;
 
 typedef struct mswin_nhmsg_print_glyph {
diff --git a/win/win32/mswproc.c b/win/win32/mswproc.c
index 998158a68..b612f79aa 100644
--- a/win/win32/mswproc.c
+++ b/win/win32/mswproc.c
@@ -988,7 +988,7 @@ void mswin_putstr_ex(winid wid, int attr, const char *text, int app)
 			 ZeroMemory(&data, sizeof(data));
 			 data.attr = attr;
 			 data.text = text;
-			 data.append = !!app;
+			 data.append = app;
 			 SendMessage( 
 				 GetNHApp()->windowlist[wid].win, 
 				 WM_MSNH_COMMAND, (WPARAM)MSNH_MSG_PUTSTR, (LPARAM)&data );