diff --git a/src/libnm-client-impl/nm-client.c b/src/libnm-client-impl/nm-client.c
index 2cf12db593..123c44c500 100644
--- a/src/libnm-client-impl/nm-client.c
+++ b/src/libnm-client-impl/nm-client.c
@@ -6261,7 +6261,6 @@ nm_client_get_capabilities(NMClient *client, gsize *length)
     NMClientPrivate *priv;
 
     g_return_val_if_fail(NM_IS_CLIENT(client), NULL);
-    g_return_val_if_fail(length, NULL);
 
     priv = NM_CLIENT_GET_PRIVATE(client);