diff --git a/src/xkb/XKBMAlloc.c b/src/xkb/XKBMAlloc.c
index 61a7359e..8b3be303 100644
--- a/src/xkb/XKBMAlloc.c
+++ b/src/xkb/XKBMAlloc.c
@@ -681,7 +681,7 @@ XkbChangeKeycodeRange(XkbDescPtr xkb,
                 if (changes) {
                     changes->map.changed = _ExtendRange(changes->map.changed,
                                                 XkbVirtualModMapMask, minKC,
-                                                &changes->map.first_modmap_key,
+                                                &changes->map.first_vmodmap_key,
                                                 &changes->map.num_vmodmap_keys);
                 }
             }
@@ -766,7 +766,7 @@ XkbChangeKeycodeRange(XkbDescPtr xkb,
                 if (changes) {
                     changes->map.changed = _ExtendRange(changes->map.changed,
                                                 XkbVirtualModMapMask, maxKC,
-                                                &changes->map.first_modmap_key,
+                                                &changes->map.first_vmodmap_key,
                                                 &changes->map.num_vmodmap_keys);
                 }
             }