diff --git a/tests/unittests/torture_channel.c b/tests/unittests/torture_channel.c
index 0762df94..de5c496a 100644
--- a/tests/unittests/torture_channel.c
+++ b/tests/unittests/torture_channel.c
@@ -12,7 +12,7 @@
 
 static void torture_channel_select(void **state)
 {
-    fd_set readfds;
+    fd_set readfds = {0};
     int fd;
     int rc;
     int i;