diff --git a/src/jrd/svc.cpp b/src/jrd/svc.cpp
index d6974b57f2..bd92f4f30f 100644
--- a/src/jrd/svc.cpp
+++ b/src/jrd/svc.cpp
@@ -2506,7 +2506,7 @@ static void service_fork(TEXT* service_path, Service* service)
 		break;
 
 	case 0:
-		if (vfork() != 0)
+		if (vfork() > 0)
 			_exit(FINI_OK);
 
 		close(pair1[0]);