diff --git a/src/tools/valgrind.supp b/src/tools/valgrind.supp
index af03051260..2f3b602773 100644
--- a/src/tools/valgrind.supp
+++ b/src/tools/valgrind.supp
@@ -52,9 +52,10 @@
 {
 	padding_XLogRecData_write
 	Memcheck:Param
-	write(buf)
+	pwrite64(buf)
 
-    ...
+	...
+	fun:pwrite
 	fun:XLogWrite
 }