diff --git a/xkb/xkbUtils.c b/xkb/xkbUtils.c
index 25b5a364e..8975ade8d 100644
--- a/xkb/xkbUtils.c
+++ b/xkb/xkbUtils.c
@@ -222,7 +222,7 @@ XkbUpdateKeyTypesFromCore(DeviceIntPtr pXDev,
     XkbDescPtr xkb;
     unsigned key, nG, explicit;
     int types[XkbNumKbdGroups];
-    KeySym tsyms[XkbMaxSymsPerKey], *syms;
+    KeySym tsyms[XkbMaxSymsPerKey] = {NoSymbol}, *syms;
     XkbMapChangesPtr mc;
 
     xkb = pXDev->key->xkbInfo->desc;