diff --git a/src/action.c b/src/action.c
index 5454242..7684202 100644
--- a/src/action.c
+++ b/src/action.c
@@ -56,7 +56,7 @@
 		return 0;
 	}
 	else {
-		if (target->proxies_list != px) {
+		if (!in_proxies_list(target->proxies_list, px)) {
 			px->next_stkt_ref = target->proxies_list;
 			target->proxies_list = px;
 		}
diff --git a/src/sample.c b/src/sample.c
index 77ec9b1..522ca9e 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -1274,7 +1274,7 @@
 				break;
 			}
 
-			if (t->proxies_list != p) {
+			if (!in_proxies_list(t->proxies_list, p)) {
 				p->next_stkt_ref = t->proxies_list;
 				t->proxies_list = p;
 			}