diff --git a/ChangeLog b/ChangeLog
index df649056..12ab1607 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -121,6 +121,9 @@ CVS code -
 	  the curses library included with SunOS 5.7-5.9.  Also define
 	  KEY_SUSPEND as -1 if it isn't defined, in case it isn't in
 	  more than just Slang. (DLR)
+	- Define all potentially missing keys as different negative
+	  values (ERR is -1, so use -2, -3, etc.) so as to avoid having
+	  duplicate case values when keys are missing. (DLR)
 - move.c:
 	- Remove unneeded inclusion of stdio.h, make various cleanups,
 	  and preserve the cursor's coordinates when paging up and down.
diff --git a/src/nano.h b/src/nano.h
index 7122fa0a..38d973b9 100644
--- a/src/nano.h
+++ b/src/nano.h
@@ -89,23 +89,27 @@
 #define strncasecmp nstrnicmp
 #endif
 
+/* Note: ERR is defined as -1, so to avoid duplicate case values when
+   some key definitions are missing, we have to set these all to
+   different negative values other than -1. */
+
 /* HP-UX 10 & 11 do not seem to support KEY_HOME and KEY_END */
 #ifndef KEY_HOME
-#define KEY_HOME -1
+#define KEY_HOME -2
 #endif
 
 #ifndef KEY_END
-#define KEY_END -1
+#define KEY_END -3
 #endif
 
 /* Slang and SunOS 5.7-5.9 do not seem to support KEY_RESIZE */
 #ifndef KEY_RESIZE
-#define KEY_RESIZE -1
+#define KEY_RESIZE -4
 #endif
 
 /* Slang does not seem to support KEY_SUSPEND */
 #ifndef KEY_SUSPEND
-#define KEY_SUSPEND -1
+#define KEY_SUSPEND -5
 #endif
 
 /* Snatch these out of the ncurses defs, so we can use them in search
@@ -338,8 +342,8 @@ typedef struct historyheadtype {
 #define NANO_ALT_BRACKET ']'
 #define NANO_ALT_SPACE ' '
 
-/* Some semi-changeable keybindings; don't play with unless you're sure you
-know what you're doing */
+/* Some semi-changeable keybindings; don't play with unless you're sure
+   you know what you're doing */
 
 #define NANO_INSERTFILE_KEY	NANO_CONTROL_R
 #define NANO_INSERTFILE_FKEY	KEY_F(5)