diff --git a/UnitTests/zlib b/UnitTests/zlib
index 643e17b74..51b7f2abd 160000
--- a/UnitTests/zlib
+++ b/UnitTests/zlib
@@ -1 +1 @@
-Subproject commit 643e17b7498d12ab8d15565662880579692f769d
+Subproject commit 51b7f2abdade71cd9bb0e7a373ef2610ec6f9daf