diff --git a/src/lj_snap.c b/src/lj_snap.c
index 877ce099..68de208f 100644
--- a/src/lj_snap.c
+++ b/src/lj_snap.c
@@ -880,11 +880,19 @@ static void snap_unsink(jit_State *J, GCtrace *T, ExitState *ex,
 		   irs->o == IR_FSTORE,
 		   "sunk store with bad op %d", irs->o);
 	if (irk->o == IR_FREF) {
-	  lj_assertJ(irk->op2 == IRFL_TAB_META,
-		     "sunk store with bad field %d", irk->op2);
-	  snap_restoreval(J, T, ex, snapno, rfilt, irs->op2, &tmp);
-	  /* NOBARRIER: The table is new (marked white). */
-	  setgcref(t->metatable, obj2gco(tabV(&tmp)));
+	  switch (irk->op2) {
+	  case IRFL_TAB_META:
+	    snap_restoreval(J, T, ex, snapno, rfilt, irs->op2, &tmp);
+	    /* NOBARRIER: The table is new (marked white). */
+	    setgcref(t->metatable, obj2gco(tabV(&tmp)));
+	    break;
+	  case IRFL_TAB_NOMM:
+	    /* Negative metamethod cache invalidated by lj_tab_set() below. */
+	    break;
+	  default:
+	    lj_assertJ(0, "sunk store with bad field %d", irk->op2);
+	    break;
+	  }
 	} else {
 	  irk = &T->ir[irk->op2];
 	  if (irk->o == IR_KSLOT) irk = &T->ir[irk->op1];