Index: uspace/lib/pcut/src/os/helenos.c
===================================================================
--- uspace/lib/pcut/src/os/helenos.c	(revision cecba66ea48d60cfa59865e98aeda663808e42c7)
+++ uspace/lib/pcut/src/os/helenos.c	(revision 0fb1755f9a1204c8e5bf55872e7b17086340cd84)
@@ -213,5 +213,6 @@
 
 	aoff64_t pos = 0;
-	vfs_read(tempfile, &pos, extra_output_buffer, OUTPUT_BUFFER_SIZE);
+	size_t nread;
+	vfs_read(tempfile, &pos, extra_output_buffer, OUTPUT_BUFFER_SIZE, &nread);
 
 leave_close_tempfile: