Index: kernel/generic/src/ipc/sysipc.c
===================================================================
--- kernel/generic/src/ipc/sysipc.c	(revision f9841e692b7ead7f19c6caf92ef08eeb5f912775)
+++ kernel/generic/src/ipc/sysipc.c	(revision 9ef1b79b3edc59d798cf9373b2025212317686c1)
@@ -480,5 +480,5 @@
 error:
 	IPC_SET_RETVAL(call->data, EFORWARD);
-	answer_preprocess(call, need_old ? &old : NULL);
+	(void) answer_preprocess(call, need_old ? &old : NULL);
 	if (after_forward)
 		_ipc_answer_free_call(call, false);