diff --git a/include/knowrob/Printable.h b/include/knowrob/Printable.h
index fe98d11e40..681e8d9322 100644
--- a/include/knowrob/Printable.h
+++ b/include/knowrob/Printable.h
@@ -48,7 +48,10 @@ namespace knowrob {
 	}
 }
 
+#include <fmt/ostream.h>
+template <> struct fmt::formatter<knowrob::Printable> : fmt::ostream_formatter {};
 
+/*
 	template <typename Char>
 	struct fmt::formatter<knowrob::Printable, Char> : public fmt::formatter<std::string, Char> {
 		template <typename FormatContext>
@@ -56,6 +59,6 @@ namespace knowrob {
 			return fmt::format_to(ctx.out(), "{}", p.format());
 		}
 	};
-
+*/
 
 #endif //KNOWROB_PRINTABLE_H