diff --git a/pkgs/applications/networking/mailreaders/thunderbird/68.nix b/pkgs/applications/networking/mailreaders/thunderbird/68.nix
index fef707b7293..707b35dd499 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/68.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/68.nix
@@ -333,6 +333,7 @@ stdenv.mkDerivation rec {
       eelco
       lovesegfault
       pierron
+      vcunat
     ];
     platforms = platforms.linux;
     license = licenses.mpl20;
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index 4f122cde02d..06bfd92f5fb 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -335,6 +335,7 @@ stdenv.mkDerivation rec {
       eelco
       lovesegfault
       pierron
+      vcunat
     ];
     platforms = platforms.linux;
     license = licenses.mpl20;