diff --git a/browser/config/mozconfigs/whitelist b/browser/config/mozconfigs/whitelist
index c4482d878725..65b66b6f2cf6 100644
--- a/browser/config/mozconfigs/whitelist
+++ b/browser/config/mozconfigs/whitelist
@@ -65,7 +65,6 @@ 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/beta b/browser/config/mozconfigs/win64/beta
index 6b9960abc3c5..6fc4ebe36743 100644
--- a/browser/config/mozconfigs/win64/beta
+++ b/browser/config/mozconfigs/win64/beta
@@ -14,4 +14,6 @@ mk_add_options MOZ_PGO=1
 ac_add_options --enable-official-branding
 ac_add_options --enable-verify-mar
 
+. "$topsrcdir/build/mozconfig.rust"
+
 . "$topsrcdir/build/mozconfig.common.override"
diff --git a/browser/config/mozconfigs/win64/release b/browser/config/mozconfigs/win64/release
index 389a1ea4b40e..b910b17d4162 100644
--- a/browser/config/mozconfigs/win64/release
+++ b/browser/config/mozconfigs/win64/release
@@ -20,4 +20,6 @@ ac_add_options --enable-verify-mar
 # defines.sh during the beta cycle
 export BUILDING_RELEASE=1
 
+'. "$topsrcdir/build/mozconfig.rust"',
+
 . "$topsrcdir/build/mozconfig.common.override"