diff --git a/src/iperf_api.c b/src/iperf_api.c
index b374690..e40fb52 100755
--- a/src/iperf_api.c
+++ b/src/iperf_api.c
@@ -2601,7 +2601,7 @@ iperf_free_stream(struct iperf_stream *sp)
     close(sp->buffer_fd);
     if (sp->diskfile_fd >= 0)
 	close(sp->diskfile_fd);
-    for (irp = TAILQ_FIRST(&sp->result->interval_results); irp != TAILQ_END(sp->result->interval_results); irp = nirp) {
+    for (irp = TAILQ_FIRST(&sp->result->interval_results); irp != NULL; irp = nirp) {
         nirp = TAILQ_NEXT(irp, irlistentries);
         free(irp);
     }