diff --git a/src/connection.hpp b/src/connection.hpp
index 101cb95e1c..4d86b45ce6 100644
--- a/src/connection.hpp
+++ b/src/connection.hpp
@@ -47,7 +47,9 @@
 #include <queue>
 
 namespace websocketpp {
-	
+
+class endpoint_base;
+
 template <typename T>
 struct connection_traits;