diff --git a/valgrind.supp b/valgrind.supp
index a5701dede3d..a4b6592f231 100644
--- a/valgrind.supp
+++ b/valgrind.supp
@@ -30,5 +30,6 @@
 {
     <sem_open false positive depending of libc version>
     Memcheck:Param
+    write(buf)
     fun:sem_open
 }