diff --git a/tools/ci/amd64/gcc/valgrind.supp b/tools/ci/amd64/gcc/valgrind.supp
index 2c2cf21..e37ff3b 100644
--- a/tools/ci/amd64/gcc/valgrind.supp
+++ b/tools/ci/amd64/gcc/valgrind.supp
@@ -1,3 +1,19 @@
+{
+    <insert_a_suppression_name_here>
+    Memcheck:Param
+    writev(vector[0])
+    fun:writev
+    fun:UnknownInlinedFun
+    fun:_xcb_conn_wait.part.0
+    fun:UnknownInlinedFun
+    fun:_xcb_out_send
+    fun:UnknownInlinedFun
+    fun:xcb_writev
+    fun:_XSend
+    fun:UnknownInlinedFun
+    fun:_XFlush
+    fun:XFlush
+}
 {
    xflush
    Memcheck:Param