diff --git a/src/resolve/resolved-dns-stub.c b/src/resolve/resolved-dns-stub.c
index b1c570cee6..e76de6c06a 100644
--- a/src/resolve/resolved-dns-stub.c
+++ b/src/resolve/resolved-dns-stub.c
@@ -498,7 +498,7 @@ static int manager_dns_stub_tcp_fd(Manager *m) {
 
 int manager_dns_stub_start(Manager *m) {
         const char *t = "UDP";
-        int r;
+        int r = 0;
 
         assert(m);