diff --git a/libopenage/main/tests.h b/libopenage/main/tests.h
index 20e7c6edbd..7a2c9e1ac6 100644
--- a/libopenage/main/tests.h
+++ b/libopenage/main/tests.h
@@ -2,6 +2,7 @@
 
 #pragma once
 
+#include "../util/compiler.h"
 // pxd: from libopenage.util.path cimport Path
 #include "../util/path.h"