diff --git a/websocketpp/http/impl/request.hpp b/websocketpp/http/impl/request.hpp
index 19f91d853a..4557df4b75 100644
--- a/websocketpp/http/impl/request.hpp
+++ b/websocketpp/http/impl/request.hpp
@@ -127,7 +127,7 @@ inline size_t request::consume(const char *buf, size_t len) {
             }
         }
 
-        begin = end+sizeof(header_delimiter)-1;
+        begin = end+(sizeof(header_delimiter)-1);
     }
 }