diff --git a/deps/zlib/deflate.c b/deps/zlib/deflate.c
index 799fb93cc..feacd7832 100644
--- a/deps/zlib/deflate.c
+++ b/deps/zlib/deflate.c
@@ -201,6 +201,11 @@ local const config configuration_table[10] = {
  * bit values at the expense of memory usage). We slide even when level == 0 to
  * keep the hash table consistent if we switch back to level > 0 later.
  */
+#if defined(__has_feature)
+#  if __has_feature(memory_sanitizer)
+__attribute__((no_sanitize("memory")))
+#  endif
+#endif
 local void slide_hash(s)
     deflate_state *s;
 {