Index: src/vdbeaux.c
==================================================================
--- src/vdbeaux.c
+++ src/vdbeaux.c
@@ -2784,11 +2784,11 @@
   KeyInfo *pKeyInfo;
   Mem mem1;
 
   pKeyInfo = pPKey2->pKeyInfo;
   mem1.enc = pKeyInfo->enc;
-  mem1.db = 0;
+  mem1.db = pKeyInfo->db;
   /* mem1.flags = 0;  // Will be initialized by sqlite3VdbeSerialGet() */
   VVA_ONLY( mem1.zMalloc = 0; ) /* Only needed by assert() statements */
 
   /* Compilers may complain that mem1.u.i is potentially uninitialized.
   ** We could initialize it, as shown here, to silence those complaints.