diff --git a/lib/iser.c b/lib/iser.c
index 95f95ec..c727be1 100644
--- a/lib/iser.c
+++ b/lib/iser.c
@@ -198,6 +198,7 @@ iser_free_iser_conn_res(struct iser_conn *iser_conn, bool destroy)
 
 		if (iser_conn->cmthread) {
 			pthread_cancel(iser_conn->cmthread);
+			pthread_join(iser_conn->cmthread, NULL);
 			iser_conn->cmthread = 0;
 		}