diff --git a/C/index.c b/C/index.c
index 3d1943e84..4e9916c19 100644
--- a/C/index.c
+++ b/C/index.c
@@ -6904,6 +6904,7 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term Terms[3], yamop *ap_pc, y
 	ipc = ipc->u.ollll.l1;
 	S = s_reg = RepPair(t);
       } else if (t == TermNil) {
+	unbounded = FALSE;
 	jlbl = &(ipc->u.ollll.l2);
 	ipc = ipc->u.ollll.l2;
       } else {