Index: ext/misc/json1.c
==================================================================
--- ext/misc/json1.c
+++ ext/misc/json1.c
@@ -1395,11 +1395,11 @@
     jsonRemoveAllNulls(pPatch);
     return pPatch;
   }
   iRoot = iTarget;
   for(i=1; i<pPatch->n; i += jsonNodeSize(&pPatch[i+1])+1){
-    int nKey;
+    u32 nKey;
     const char *zKey;
     assert( pPatch[i].eType==JSON_STRING );
     assert( pPatch[i].jnFlags & JNODE_LABEL );
     nKey = pPatch[i].n;
     zKey = pPatch[i].u.zJContent;