diff --git a/include/ctti/detail/name_filters.hpp b/include/ctti/detail/name_filters.hpp
index 4fe208c..468bd3f 100644
--- a/include/ctti/detail/name_filters.hpp
+++ b/include/ctti/detail/name_filters.hpp
@@ -60,7 +60,7 @@ constexpr const char* find_ith(const ctti::detail::cstring& name, const ctti::de
 
 constexpr const char* find_last(const ctti::detail::cstring& name, const ctti::detail::cstring& substring)
 {
-    return find_ith_impl(name, substring, name.end(), -1, true);
+    return find_ith_impl(name, substring, name.end(), static_cast<size_t>(-1), true);
 }
 
 constexpr const char* find(const ctti::detail::cstring& name, const ctti::detail::cstring& substring)