diff --git a/include/internal/catch_matchers.hpp b/include/internal/catch_matchers.hpp
index 14249ebf..55b1eeea 100644
--- a/include/internal/catch_matchers.hpp
+++ b/include/internal/catch_matchers.hpp
@@ -15,7 +15,7 @@ namespace Matchers {
     namespace Generic {
         template<typename ExpressionT> class AllOf;
         template<typename ExpressionT> class AnyOf;
-        template<typename ExpressionT> class Not;
+        template<typename ExpressionT> struct Not;
     }
         
     template<typename ExpressionT>