1 files changed, 1 insertions, 1 deletions
diff --git a/c/common.h b/c/common.h
index efaa800..7d3f8bd 100644
--- a/c/common.h
+++ b/c/common.h
@@ -66,7 +66,7 @@ inline auto throw_nil(T... args)
 template <auto f, class... T>
 inline auto warn_nil(T... args)
 {
-	decltype(f(args...)) r;
+	decltype(f(std::declval<T>()...)) r;
 	try {
 		r = throw_nil<f>(args...);
 	} catch (Win32Error& e) {