diff --git a/pkgs/servers/asterisk/default.nix b/pkgs/servers/asterisk/default.nix
index bb45f0a00e6..ed772e7b247 100644
--- a/pkgs/servers/asterisk/default.nix
+++ b/pkgs/servers/asterisk/default.nix
@@ -57,5 +57,8 @@ stdenv.mkDerivation rec {
     homepage = http://www.asterisk.org/;
     license = licenses.gpl2;
     maintainers = with maintainers; [ auntie ];
+    # Marked as broken due to needing an update for security issues.
+    # See: https://github.com/NixOS/nixpkgs/issues/18856
+    broken = true;
   };
 }