diff --git a/programs/services/services.c b/programs/services/services.c
index 971be4d382a..0634c837836 100644
--- a/programs/services/services.c
+++ b/programs/services/services.c
@@ -322,7 +322,7 @@ static void scmdatabase_remove_service(struct scmdatabase *db, struct service_en
     service->entry.next = service->entry.prev = NULL;
 }
 
-static int compare_tags(const void *a, const void *b)
+static int __cdecl compare_tags(const void *a, const void *b)
 {
     struct service_entry *service_a = *(struct service_entry **)a;
     struct service_entry *service_b = *(struct service_entry **)b;