diff --git a/libs/util/include/psemek/util/exception.hpp b/libs/util/include/psemek/util/exception.hpp
index 48ada36c..8890529c 100644
--- a/libs/util/include/psemek/util/exception.hpp
+++ b/libs/util/include/psemek/util/exception.hpp
@@ -16,8 +16,7 @@ namespace psemek::util
 #else
 	struct stacktrace
 	{
-		template <typename Stream>
-		friend Stream & operator << (Stream & stream, stacktrace)
+		friend std::ostream & operator << (std::ostream & stream, stacktrace)
 		{
 			stream << "(stacktrace disabled)\n";
 			return stream;