Index: libcfa/src/concurrency/mutex_stmt.hfa
===================================================================
--- libcfa/src/concurrency/mutex_stmt.hfa	(revision a6b48f68cb246083ed368992a7503a9f6220110c)
+++ libcfa/src/concurrency/mutex_stmt.hfa	(revision f32448e57f0ab8d1fe2a3f2dab0086e667006f4b)
@@ -30,5 +30,5 @@
 forall(L & | is_lock(L)) {
     static inline void * __get_mutexstmt_lock_ptr( L & this ) { return &this; }
-    static inline L __get_mutexstmt_lock_type( L & this ) {}
-    static inline L __get_mutexstmt_lock_type( L * this ) {}
+    static inline L __get_mutexstmt_lock_type( L & ) {}
+    static inline L __get_mutexstmt_lock_type( L * ) {}
 }