diff --git a/tests/unittests/torture_channel.c b/tests/unittests/torture_channel.c
index de5c496a..c165c572 100644
--- a/tests/unittests/torture_channel.c
+++ b/tests/unittests/torture_channel.c
@@ -12,13 +12,15 @@
 
 static void torture_channel_select(void **state)
 {
-    fd_set readfds = {0};
+    fd_set readfds;
     int fd;
     int rc;
     int i;
 
     (void)state; /* unused */
 
+    ZERO_STRUCT(readfds);
+
     fd = open("/dev/null", 0);
     assert_true(fd > 2);