diff --git a/chromium-77.0.3865.75-unbundle-zlib.patch b/chromium-77.0.3865.75-unbundle-zlib.patch
new file mode 100644
index 00000000..d6c45ad8
--- /dev/null
+++ b/chromium-77.0.3865.75-unbundle-zlib.patch
@@ -0,0 +1,25 @@
+From e1bbdec720a333937bd1b990ae0f7ee97db0d3b0 Mon Sep 17 00:00:00 2001
+From: Your Name <you@example.com>
+Date: Fri, 28 Jun 2019 15:56:23 +0000
+Subject: [PATCH] update zlib
+
+---
+ third_party/perfetto/gn/BUILD.gn | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/third_party/perfetto/gn/BUILD.gn b/third_party/perfetto/gn/BUILD.gn
+index c951f5f..297eee3 100644
+--- a/third_party/perfetto/gn/BUILD.gn
++++ b/third_party/perfetto/gn/BUILD.gn
+@@ -200,7 +200,7 @@ group("zlib") {
+       "//buildtools:zlib",
+     ]
+   } else if (build_with_chromium) {
+-    public_configs = [ "//third_party/zlib:zlib_config" ]
++    public_configs = [ "//third_party/zlib:system_zlib" ]
+     public_deps = [
+       "//third_party/zlib",
+     ]
+-- 
+2.21.0
+
diff --git a/chromium.spec b/chromium.spec
index 100b665c..71a6cfa0 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -274,6 +274,8 @@ Patch62:	chromium-76.0.3809.100-gcc-remoting-constexpr.patch
 Patch63:	chromium-76.0.3809.100-vtable-symbol-undefined.patch
 # https://chromium.googlesource.com/chromium/src.git/+/3c9720245e440c4b7222f8348d2a2a3c25e098ae
 Patch64:	chromium-77.0.3865.75-certificate-transparency.patch
+# https://gitweb.gentoo.org/repo/gentoo.git/tree/www-client/chromium/files/chromium-unbundle-zlib.patch
+Patch65:	chromium-77.0.3865.75-unbundle-zlib.patch
 
 # Apply these changes to work around EPEL7 compiler issues
 Patch100:	chromium-62.0.3202.62-kmaxskip-constexpr.patch
@@ -835,6 +837,7 @@ udev.
 %patch62 -p1 -b .gcc-remoting-constexpr
 %patch63 -p1 -b .vtable-symbol-undefined
 %patch64 -p1 -b .certificate-transparency
+%patch65 -p1 -b .unbundle-zlib
 
 # EPEL specific patches
 %if 0%{?rhel} == 7