Index: uspace/lib/pcut/src/os/helenos.c
===================================================================
--- uspace/lib/pcut/src/os/helenos.c	(revision 8d2dd7f2d52fbc7693f94b66e451eeff3756d061)
+++ uspace/lib/pcut/src/os/helenos.c	(revision 2591a10ee3228dd6b71d84ece62984136397d48e)
@@ -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: