diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index b6bf9803b4..7d7f8758ca 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -2121,6 +2121,7 @@ int config_parse_tcp_advmss(
 
         if (isempty(rvalue)) {
                 n->advmss = 0;
+                TAKE_PTR(n);
                 return 0;
         }