diff --git a/interpret.h b/interpret.h
index 3215833..0293436 100644
--- a/interpret.h
+++ b/interpret.h
@@ -1065,6 +1065,8 @@ match_re:
 			if (op != Op_match_rec) {
 				decr_sp();
 				DEREF(t1);
+				if (m->type == Node_dynregex)
+				 	DEREF(m->re_exp);
 			}
 			r = node_Boolean[di];
 			UPREF(r);
@@ -1077,7 +1079,6 @@ match_re:
 			m = pc->memory;
 			t1 = TOP_STRING();
 			if (m->type == Node_dynregex) {
-				unref(m->re_exp);
 				m->re_exp = t1;
 				decr_sp();
 				t1 = TOP_STRING();