diff --git a/include/knowrob/terms/Term.h b/include/knowrob/terms/Term.h
index 38dc76610b..e29d32dd34 100644
--- a/include/knowrob/terms/Term.h
+++ b/include/knowrob/terms/Term.h
@@ -117,6 +117,8 @@ namespace knowrob {
 	using TermPtr = std::shared_ptr<Term>;
 }
 
-//template <> struct fmt::formatter<knowrob::Term> : fmt::ostream_formatter {};
+#if FMT_VERSION >= 90000
+template <> struct fmt::formatter<knowrob::Term> : fmt::ostream_formatter {};
+#endif
 
 #endif //KNOWROB_TERM_H_