diff --git a/browser/config/mozconfigs/whitelist b/browser/config/mozconfigs/whitelist
index 54edec3f9c74..4d85bc90d9cd 100644
--- a/browser/config/mozconfigs/whitelist
+++ b/browser/config/mozconfigs/whitelist
@@ -67,6 +67,7 @@ whitelist['nightly']['win32'] += [
 whitelist['nightly']['win64'] += [
     '. "$topsrcdir/browser/config/mozconfigs/win64/common-win64"',
     '. "$topsrcdir/build/mozconfig.cache"',
+    '. "$topsrcdir/build/mozconfig.rust"',
 ]
 
 for platform in all_platforms:
diff --git a/browser/config/mozconfigs/win64/debug b/browser/config/mozconfigs/win64/debug
index 80054ba132e5..b361a4db204d 100644
--- a/browser/config/mozconfigs/win64/debug
+++ b/browser/config/mozconfigs/win64/debug
@@ -30,5 +30,7 @@ ac_add_options --with-branding=browser/branding/nightly
 
 . $topsrcdir/build/win64/mozconfig.vs2013
 
+. "$topsrcdir/build/mozconfig.rust"
+
 . "$topsrcdir/build/mozconfig.common.override"
 . "$topsrcdir/build/mozconfig.cache"
diff --git a/browser/config/mozconfigs/win64/nightly b/browser/config/mozconfigs/win64/nightly
index 9c31c44644ee..f710aabe3a01 100644
--- a/browser/config/mozconfigs/win64/nightly
+++ b/browser/config/mozconfigs/win64/nightly
@@ -7,5 +7,7 @@ ac_add_options --enable-verify-mar
 
 ac_add_options --with-branding=browser/branding/nightly
 
+. "$topsrcdir/build/mozconfig.rust"
+
 . "$topsrcdir/build/mozconfig.common.override"
 . "$topsrcdir/build/mozconfig.cache"