Index: kernel/generic/src/ipc/ops/datawrite.c
===================================================================
--- kernel/generic/src/ipc/ops/datawrite.c	(revision b7fd2a02e4161f4edd38548e7f8456b8021549be)
+++ kernel/generic/src/ipc/ops/datawrite.c	(revision 36df27ebb72758daf4d2179e70f231ac0e059a83)
@@ -58,5 +58,5 @@
 	call->buffer = (uint8_t *) malloc(size, 0);
 	errno_t rc = copy_from_uspace(call->buffer, (void *) src, size);
-	if (rc != 0) {
+	if (rc != EOK) {
 		/*
 		 * call->buffer will be cleaned up in ipc_call_free() at the
Index: kernel/generic/src/ipc/sysipc.c
===================================================================
--- kernel/generic/src/ipc/sysipc.c	(revision b7fd2a02e4161f4edd38548e7f8456b8021549be)
+++ kernel/generic/src/ipc/sysipc.c	(revision 36df27ebb72758daf4d2179e70f231ac0e059a83)
@@ -424,5 +424,5 @@
 	errno_t rc = copy_from_uspace(&call->data.args, &data->args,
 	    sizeof(call->data.args));
-	if (rc != 0) {
+	if (rc != EOK) {
 		kobject_put(call->kobject);
 		kobject_put(kobj);
@@ -607,5 +607,5 @@
 	errno_t rc = copy_from_uspace(&newdata.args, &data->args,
 	    sizeof(newdata.args));
-	if (rc != 0)
+	if (rc != EOK)
 		return (sys_errno_t) rc;
 	
@@ -697,5 +697,5 @@
 	errno_t rc = copy_from_uspace(&call->data.args, &data->args, 
 	    sizeof(call->data.args));
-	if (rc != 0) {
+	if (rc != EOK) {
 		/*
 		 * Republish the capability so that the call does not get lost.