Index: uspace/srv/fs/fat/fat_ops.c
===================================================================
--- uspace/srv/fs/fat/fat_ops.c	(revision c06dbf987b8818e884ffb821d8939584cb0ebe41)
+++ uspace/srv/fs/fat/fat_ops.c	(revision 874a0e81f587d2231688bdf5a15ca3f3306c176a)
@@ -725,5 +725,5 @@
 	ipc_callid_t callid;
 	size_t len;
-	if (!ipc_data_write_receive(&callid, &len)) {
+	if (!ipc_data_read_receive(&callid, &len)) {
 		fat_node_put(nodep);
 		ipc_answer_0(callid, EINVAL);