diff --git a/tests/test-client.c b/tests/test-client.c
index 1db16153..f490b272 100644
--- a/tests/test-client.c
+++ b/tests/test-client.c
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <assert.h>
+#include <poll.h>
 #include <wayland-client.h>
 
 struct display {