diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
index d262481af354..a6c6e3e5e6db 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
@@ -38,7 +38,6 @@ let
   pname = "thunderbird-bin";
 
   mozillaPlatforms = {
-    i686-linux = "linux-i686";
     x86_64-linux = "linux-x86_64";
     # bundles are universal and can be re-used for both darwin architectures
     aarch64-darwin = "mac";