diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a96c9e3..9e0681b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 Version 124:
 
+* Fix for a test matrix compiler
+
 API Changes:
 
 * http write returns success on connection close
diff --git a/test/beast/websocket/accept.cpp b/test/beast/websocket/accept.cpp
index ee6d87df..b98640a4 100644
--- a/test/beast/websocket/accept.cpp
+++ b/test/beast/websocket/accept.cpp
@@ -39,7 +39,7 @@ public:
             void
             operator()(response_type&) const
             {
-                b_ = true;
+                this->b_ = true;
             }
         };