diff --git a/src/network/networkd-bridge.c b/src/network/networkd-bridge.c
index 2c541463ec9..ed0d692992f 100644
--- a/src/network/networkd-bridge.c
+++ b/src/network/networkd-bridge.c
@@ -246,6 +246,9 @@ static int bridge_load_one(Manager *manager, const char *filename) {
         _cleanup_fclose_ FILE *file = NULL;
         int r;
 
+        assert(manager);
+        assert(filename);
+
         file = fopen(filename, "re");
         if (!file) {
                 if (errno == ENOENT)
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index ae8d4d160d9..80c952a55b7 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -30,6 +30,9 @@ static int network_load_one(Manager *manager, const char *filename) {
         _cleanup_fclose_ FILE *file = NULL;
         int r;
 
+        assert(manager);
+        assert(filename);
+
         file = fopen(filename, "re");
         if (!file) {
                 if (errno == ENOENT)