Index: uspace/srv/fs/tmpfs/tmpfs_ops.c
===================================================================
--- uspace/srv/fs/tmpfs/tmpfs_ops.c	(revision 860271d40119cf9d1999b88bdac7ceeca219a5b3)
+++ uspace/srv/fs/tmpfs/tmpfs_ops.c	(revision fadfaf8e0a1d314df7a833d01e2c60bf6bf09948)
@@ -273,6 +273,8 @@
 		
 		if (*bufpos == *buflen) {
-			int retval;
-			int rc = ipc_call_sync_2_1(phone, RD_READ_BLOCK, *pos / BLOCK_SIZE, BLOCK_SIZE, (sysarg_t *) &retval);
+			ipcarg_t retval;
+			int rc = ipc_call_sync_2_1(phone, RD_READ_BLOCK,
+			    *pos / BLOCK_SIZE, BLOCK_SIZE,
+			    &retval);
 			if ((rc != EOK) || (retval != EOK))
 				return false;