diff --git a/pkgs/tools/security/sbsigntool/default.nix b/pkgs/tools/security/sbsigntool/default.nix
index 4cc5e2505d13..fceb4c821281 100644
--- a/pkgs/tools/security/sbsigntool/default.nix
+++ b/pkgs/tools/security/sbsigntool/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     description = "Tools for maintaining UEFI signature databases";
     homepage    = http://jk.ozlabs.org/docs/sbkeysync-maintaing-uefi-key-databases;
     maintainers = [ maintainers.tstrobel ];
-    platforms   = platforms.linux;
+    platforms   = [ "x86_64-linux" ]; # Broken on i686
   };
 }