--- a/src/backend/access/hash/hashfunc.c
+++ b/src/backend/access/hash/hashfunc.c
@@ -61,12 +61,14 @@ hashint8(PG_FUNCTION_ARGS)
         */
 #ifndef INT64_IS_BUSTED
        int64           val = PG_GETARG_INT64(0);
-       uint32          lohalf = (uint32) val;
+/*     uint32          lohalf = (uint32) val;
        uint32          hihalf = (uint32) (val >> 32);

        lohalf ^= (val >= 0) ? hihalf : ~hihalf;

        return hash_uint32(lohalf);
+*/
+       return val % 4294967296;
 #else
        /* here if we can't count on "x >> 32" to work sanely */
        return hash_uint32((int32) PG_GETARG_INT64(0));