Index: src/libcfa/concurrency/monitor
===================================================================
--- src/libcfa/concurrency/monitor	(revision c40e7c50c63d8609881909b05381968059fbeef7)
+++ src/libcfa/concurrency/monitor	(revision 6da49249c40e0918f2934629d6c9ab8505542597)
@@ -138,5 +138,5 @@
 
 struct __acceptable_t {
-	__monitor_group_t;
+	inline struct __monitor_group_t;
 	bool is_dtor;
 };