diff --git a/include/internal/catch_decomposer.h b/include/internal/catch_decomposer.h
index 6d20be78..8cb4c1d4 100644
--- a/include/internal/catch_decomposer.h
+++ b/include/internal/catch_decomposer.h
@@ -76,14 +76,14 @@ namespace Catch {
 
     // Specialised comparison functions to handle equality comparisons between ints and pointers (NULL deduces as an int)
     template<typename LhsT, typename RhsT>
-    auto compareEqual( LhsT lhs, RhsT&& rhs ) -> bool { return lhs == rhs; };
+    auto compareEqual( LhsT const& lhs, RhsT&& rhs ) -> bool { return const_cast<LhsT&>( lhs ) == rhs; };
     template<typename T>
     auto compareEqual( T* const& lhs, int rhs ) -> bool { return lhs == reinterpret_cast<void const*>( rhs ); };
     template<typename T>
     auto compareEqual( int lhs, T* const& rhs ) -> bool { return reinterpret_cast<void const*>( lhs ) == rhs; };
 
     template<typename LhsT, typename RhsT>
-    auto compareNotEqual( LhsT lhs, RhsT&& rhs ) -> bool { return lhs != rhs; };
+    auto compareNotEqual( LhsT const& lhs, RhsT&& rhs ) -> bool { return const_cast<LhsT&>( lhs ) != rhs; };
     template<typename T>
     auto compareNotEqual( T* const& lhs, int rhs ) -> bool { return lhs != reinterpret_cast<void const*>( rhs ); };
     template<typename T>