diff --git a/include/internal/catch_interfaces_reporter.h b/include/internal/catch_interfaces_reporter.h
index 9d99c981..e5fbf8bb 100644
--- a/include/internal/catch_interfaces_reporter.h
+++ b/include/internal/catch_interfaces_reporter.h
@@ -80,8 +80,8 @@ namespace Catch {
 
         AssertionStats( AssertionStats const& )              = default;
         AssertionStats( AssertionStats && )                  = default;
-        AssertionStats& operator = ( AssertionStats const& ) = default;
-        AssertionStats& operator = ( AssertionStats && )     = default;
+        AssertionStats& operator = ( AssertionStats const& ) = delete;
+        AssertionStats& operator = ( AssertionStats && )     = delete;
         virtual ~AssertionStats();
 
         AssertionResult assertionResult;