diff --git a/srcpkgs/firefox-esr/template b/srcpkgs/firefox-esr/template
index 773a4215510..e7594c57a72 100644
--- a/srcpkgs/firefox-esr/template
+++ b/srcpkgs/firefox-esr/template
@@ -1,4 +1,7 @@
 # Template file for 'firefox-esr'
+#
+# THIS PKG MUST BE SYNCHRONIZED WITH "srcpkgs/firefox-esr-i18n".
+#
 pkgname=firefox-esr
 version=52.7.3
 revision=1
@@ -11,7 +14,6 @@ distfiles="${MOZILLA_SITE}/firefox/releases/${version}esr/source/firefox-${versi
 checksum=5cc68c1a7486cfbbf02aec0e9da9f87b55e7bfc68c7d5139bc1e578441aaf19f
 
 lib32disabled=yes
-
 hostmakedepends="autoconf213 unzip zip pkg-config perl python yasm
  $(vopt_if rust cargo)"
 makedepends="