diff --git a/tests/eek-simple-test.c b/tests/eek-simple-test.c
index 2a7753e4..8750026d 100644
--- a/tests/eek-simple-test.c
+++ b/tests/eek-simple-test.c
@@ -19,6 +19,8 @@
  */
 #include "eek/eek.h"
 
+#include <gtk/gtk.h>
+
 static void
 test_create (void)
 {