Index: src/libcfa/concurrency/monitor
===================================================================
--- src/libcfa/concurrency/monitor	(revision c40e7c50c63d8609881909b05381968059fbeef7)
+++ src/libcfa/concurrency/monitor	(revision 95d09bdb7a1de4efbcd624c46a357ff42809eb6b)
@@ -138,5 +138,5 @@
 
 struct __acceptable_t {
-	__monitor_group_t;
+	inline struct __monitor_group_t;
 	bool is_dtor;
 };