diff --git a/src/config/kbdbind.c b/src/config/kbdbind.c
index db597af6..43af3094 100644
--- a/src/config/kbdbind.c
+++ b/src/config/kbdbind.c
@@ -584,7 +584,7 @@ bind_key_to_event(unsigned char *ckmap, const unsigned char *ckey, int event)
 	action_id_T action_id;
 	enum keymap_id keymap_id = get_keymap_id(ckmap);
 
-	if (keymap_id < 0)
+	if (keymap_id == KEYMAP_INVALID)
 		return gettext("Unrecognised keymap");
 
 	if (parse_keystroke(ckey, &kbd) < 0)
@@ -907,7 +907,7 @@ bind_do(unsigned char *keymap_str, const unsigned char *keystroke_str,
 	struct keybinding *keybinding;
 
 	keymap_id = get_keymap_id(keymap_str);
-	if (keymap_id < 0) return 1;
+	if (keymap_id == KEYMAP_INVALID) return 1;
 
 	if (parse_keystroke(keystroke_str, &kbd) < 0) return 2;
 
@@ -929,7 +929,7 @@ bind_act(unsigned char *keymap_str, const unsigned char *keystroke_str)
 	struct keybinding *keybinding;
 
 	keymap_id = get_keymap_id(keymap_str);
-	if (keymap_id < 0)
+	if (keymap_id == KEYMAP_INVALID)
 		return NULL;
 
 	keybinding = kbd_stroke_lookup(keymap_id, keystroke_str);
diff --git a/src/config/kbdbind.h b/src/config/kbdbind.h
index 4ef6f1a2..e046fd8b 100644
--- a/src/config/kbdbind.h
+++ b/src/config/kbdbind.h
@@ -14,6 +14,7 @@ struct module;
 typedef long action_id_T;
 
 enum keymap_id {
+	KEYMAP_INVALID = -1,
 	KEYMAP_MAIN,
 	KEYMAP_EDIT,
 	KEYMAP_MENU,