diff --git a/NEWS b/NEWS
index 0825c118e..41c2a23fe 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,7 @@ ver 0.23.13 (not yet released)
 * Linux
   - shut down if parent process dies in --no-daemon mode
   - determine systemd unit directories via pkg-config
+* support libfmt 10
 
 ver 0.23.12 (2023/01/17)
 * input
diff --git a/src/TimePrint.cxx b/src/TimePrint.cxx
index 6f8cca631..44f895e69 100644
--- a/src/TimePrint.cxx
+++ b/src/TimePrint.cxx
@@ -36,5 +36,5 @@ time_print(Response &r, const char *name,
 		return;
 	}
 
-	r.Fmt(FMT_STRING("{}: {}\n"), name, s);
+	r.Fmt(FMT_STRING("{}: {}\n"), name, s.c_str());
 }