diff --git a/extra/chromium/0004-Fix-missing-cmath-header-build-failure-in-renderer-e.patch b/extra/chromium/0004-Fix-missing-cmath-header-build-failure-in-renderer-e.patch
new file mode 100644
index 000000000..c210bce3c
--- /dev/null
+++ b/extra/chromium/0004-Fix-missing-cmath-header-build-failure-in-renderer-e.patch
@@ -0,0 +1,50 @@
+From 7eb17cf705a9e38fb9f9b82331398d3ed50bce63 Mon Sep 17 00:00:00 2001
+From: Andres Salomon <dilinger@queued.net>
+Date: Wed, 28 Sep 2022 03:41:16 +0000
+Subject: [PATCH 4/4] Fix missing cmath header build failure in renderer
+ extension
+
+Building 106.0.5249.51 on a Debian machine, I hit the following
+build error:
+
+FAILED: obj/extensions/renderer/renderer/argument_spec.o
+clang++ [...] -o obj/extensions/renderer/renderer/argument_spec.o
+../../extensions/renderer/bindings/argument_spec.cc:410:16: error: no member named 'isnan' in namespace 'std'
+      if (std::isnan(double_val) || std::isinf(double_val)) {
+          ~~~~~^
+../../extensions/renderer/bindings/argument_spec.cc:410:42: error: no member named 'isinf' in namespace 'std'
+      if (std::isnan(double_val) || std::isinf(double_val)) {
+                                    ~~~~~^
+2 errors generated.
+
+isnan and isinf are both found in the cmath header, so simply
+including it fixes that build error.
+
+R=rdevlin.cronin@chromium.org, tjudkins@chromium.org
+
+Change-Id: I95c49a8f90a5a734b62b8988dc3138e3afa3c6f6
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3913616
+Commit-Queue: Andres Salomon <dilinger@queued.net>
+Auto-Submit: Andres Salomon <dilinger@queued.net>
+Reviewed-by: Tim <tjudkins@chromium.org>
+Cr-Commit-Position: refs/heads/main@{#1052196}
+---
+ extensions/renderer/bindings/argument_spec.cc | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/extensions/renderer/bindings/argument_spec.cc b/extensions/renderer/bindings/argument_spec.cc
+index ba6c258e0c38b..e0916660f68f1 100644
+--- a/extensions/renderer/bindings/argument_spec.cc
++++ b/extensions/renderer/bindings/argument_spec.cc
+@@ -4,6 +4,8 @@
+ 
+ #include "extensions/renderer/bindings/argument_spec.h"
+ 
++#include <cmath>
++
+ #include "base/check.h"
+ #include "base/strings/string_piece.h"
+ #include "base/strings/string_util.h"
+-- 
+2.37.3
+