diff --git a/format.c b/format.c
index 48629d38..b1f64034 100644
--- a/format.c
+++ b/format.c
@@ -4429,6 +4429,9 @@ format_loop_sessions(struct format_expand_state *es, const char *fmt)
 		free(expanded);
 	}
 
+	free(active);
+	free(all);
+
 	return (value);
 }