diff --git a/src/xkb/XKBMAlloc.c b/src/xkb/XKBMAlloc.c
index 0b86aa1d..2e39634a 100644
--- a/src/xkb/XKBMAlloc.c
+++ b/src/xkb/XKBMAlloc.c
@@ -300,7 +300,7 @@ XkbAddKeyType(XkbDescPtr xkb,
             }
         }
     }
-    if ((!map) || (!map->types) || (!map->num_types < XkbNumRequiredTypes)) {
+    if ((!map) || (!map->types) || (map->num_types < XkbNumRequiredTypes)) {
         tmp = XkbNumRequiredTypes + 1;
         if (XkbAllocClientMap(xkb, XkbKeyTypesMask, tmp) != Success)
             return NULL;