diff --git a/.gitmodules b/.gitmodules
index bbadbb5..c177d2f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,5 @@
 [submodule "lib/zlib"]
 	path = lib/zlib
 	url = https://github.com/cloudflare/zlib.git
+	branch = gcc.amd64
+
diff --git a/lib/zlib b/lib/zlib
index 5089329..9465261 160000
--- a/lib/zlib
+++ b/lib/zlib
@@ -1 +1 @@
-Subproject commit 50893291621658f355bc5b4d450a8d06a563053d
+Subproject commit 94652610e8cb2334440f03b4248ed26b53322d3d