diff --git a/src/shared/varlink.c b/src/shared/varlink.c
index 984dea1ff5..c34a08cf57 100644
--- a/src/shared/varlink.c
+++ b/src/shared/varlink.c
@@ -2076,7 +2076,7 @@ static int validate_connection(VarlinkServer *server, const struct ucred *ucred)
         return 1;
 }
 
-static int count_connection(VarlinkServer *server, struct ucred *ucred) {
+static int count_connection(VarlinkServer *server, const struct ucred *ucred) {
         unsigned c;
         int r;