Index: src/wherecode.c
==================================================================
--- src/wherecode.c
+++ src/wherecode.c
@@ -776,11 +776,11 @@
   assert( iIdxCur>0 );
   assert( pIdx->aiColumn[pIdx->nColumn-1]==-1 );
   
   sqlite3VdbeAddOp3(v, OP_Seek, iIdxCur, 0, iCur);
   if( (pWInfo->wctrlFlags & WHERE_FORCE_TABLE)
-   && sqlite3ParseToplevel(pParse)->writeMask==0 
+   && DbMaskAllZero(sqlite3ParseToplevel(pParse)->writeMask)
   ){
     int i;
     Table *pTab = pIdx->pTable;
     int *ai = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int)*(pTab->nCol+1));
     if( ai ){