diff --git a/deps/nostalgia/src/olympic/keel/include/keel/typeconv.hpp b/deps/nostalgia/src/olympic/keel/include/keel/typeconv.hpp
index f5e0d68..971bf22 100644
--- a/deps/nostalgia/src/olympic/keel/include/keel/typeconv.hpp
+++ b/deps/nostalgia/src/olympic/keel/include/keel/typeconv.hpp
@@ -140,7 +140,7 @@ class ConverterFunc final: public BaseConverter {
 	private:
 		template<typename SrcType, typename DstType>
 		struct ParamPack {
-			using Src = SrcType;
+			using Src = ox::remove_const_t<SrcType>;
 			using Dst = DstType;
 		};