Index: src/vdbemem.c
==================================================================
--- src/vdbemem.c
+++ src/vdbemem.c
@@ -1509,11 +1509,11 @@
       sqlite3ValueApplyAffinity(pVal, affinity, enc);
     }
   }else if( op==TK_NULL ){
     pVal = valueNew(db, pCtx);
     if( pVal==0 ) goto no_mem;
-    sqlite3VdbeMemNumerify(pVal);
+    sqlite3VdbeMemSetNull(pVal);
   }
 #ifndef SQLITE_OMIT_BLOB_LITERAL
   else if( op==TK_BLOB ){
     int nVal;
     assert( pExpr->u.zToken[0]=='x' || pExpr->u.zToken[0]=='X' );