diff --git a/test/bench/zlib/deflate_stream.cpp b/test/bench/zlib/deflate_stream.cpp
index 04578110..321fa98c 100644
--- a/test/bench/zlib/deflate_stream.cpp
+++ b/test/bench/zlib/deflate_stream.cpp
@@ -68,7 +68,6 @@ public:
     doDeflateBeast(string_view const& in)
     {
         z_params zs;
-        memset(&zs, 0, sizeof(zs));
         deflate_stream ds;
         ds.reset(
             Z_DEFAULT_COMPRESSION,
diff --git a/test/bench/zlib/inflate_stream.cpp b/test/bench/zlib/inflate_stream.cpp
index a79a9219..ea8d6d98 100644
--- a/test/bench/zlib/inflate_stream.cpp
+++ b/test/bench/zlib/inflate_stream.cpp
@@ -102,7 +102,6 @@ public:
     {
         z_params zs;
         std::string out;
-        memset(&zs, 0, sizeof(zs));
         inflate_stream is;
         zs.next_in = &in[0];
         zs.avail_in = in.size();