diff --git a/libs/log/include/psemek/log/log.hpp b/libs/log/include/psemek/log/log.hpp
index 562cf3c4..1382481a 100644
--- a/libs/log/include/psemek/log/log.hpp
+++ b/libs/log/include/psemek/log/log.hpp
@@ -30,7 +30,7 @@ namespace psemek::log
 		template <typename T>
 		log_stream & operator << (T const & x)
 		{
-			os_ << x;
+			static_cast<std::ostream &>(os_) << x;
 			return *this;
 		}