Index: uspace/lib/drv/generic/driver.c
===================================================================
--- uspace/lib/drv/generic/driver.c	(revision dc0b96419120ee5e704d73292cca782d65f45781)
+++ uspace/lib/drv/generic/driver.c	(revision eb667613a9821baef69a2514cbc33a1bd8f3d782)
@@ -203,6 +203,5 @@
 			break;
 		default:
-			if (!(callid & IPC_CALLID_NOTIFICATION))
-				ipc_answer_0(callid, ENOENT);
+			ipc_answer_0(callid, ENOENT);
 		}
 	}