Index: src/AST/Fwd.hpp
===================================================================
--- src/AST/Fwd.hpp	(revision 3945abe88b7b9b2808b8106d9c47bb28a32ac879)
+++ src/AST/Fwd.hpp	(revision d5cfc7e09773908daa8a68543ef7c5eaf3b263fa)
@@ -60,4 +60,5 @@
 class NullStmt;
 class ImplicitCtorDtorStmt;
+class MutexStmt;
 
 class Expr;