diff --git a/pkgs/applications/editors/emacs-modes/prolog/default.nix b/pkgs/applications/editors/emacs-modes/prolog/default.nix
index b01c526aa8e..337a1585b1b 100644
--- a/pkgs/applications/editors/emacs-modes/prolog/default.nix
+++ b/pkgs/applications/editors/emacs-modes/prolog/default.nix
@@ -17,5 +17,8 @@ stdenv.mkDerivation {
     homepage = http://bruda.ca/emacs/prolog_mode_for_emacs/;
     description = "Prolog mode for Emacs";
     license = stdenv.lib.licenses.gpl2Plus;
+
+    # Has wrong sha256
+    broken = true;
   };
 }