diff --git a/Misc/valgrind-python.supp b/Misc/valgrind-python.supp
index 38a5ea3cd2b..c9c45ba7ed6 100644
--- a/Misc/valgrind-python.supp
+++ b/Misc/valgrind-python.supp
@@ -263,6 +263,14 @@
 
 }
 
+{
+   Uninitialised byte(s) false alarm, see bpo-35561
+   Memcheck:Param
+   epoll_ctl(event)
+   fun:epoll_ctl
+   fun:pyepoll_internal_ctl
+}
+
 {
    ZLIB problems, see test_gzip
    Memcheck:Cond