diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
index 6912941c68a1..8ff2179e8928 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
@@ -33,7 +33,6 @@ let
   inherit (generated) version sources;
 
   mozillaPlatforms = {
-    i686-linux = "linux-i686";
     x86_64-linux = "linux-x86_64";
   };