diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index afd8fed91562..9c146c16b089 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -164,7 +164,6 @@ mapAliases ({
   libintlOrEmpty = stdenv.lib.optional (!stdenv.isLinux || stdenv.hostPlatform.libc != "glibc") gettext; # added 2018-03-14
   libjson_rpc_cpp = libjson-rpc-cpp; # added 2017-02-28
   liblapackWithoutAtlas = liblapack; # added 2018-11-05
-  liblapackWithAtlas = liblapack; # added 2018-11-05
   libmysql = mysql.connector-c; # added # 2017-12-28, this was a misnomer refering to libmysqlclient
   librecad2 = librecad;  # backwards compatibility alias, added 2015-10
   libsysfs = sysfsutils; # added 2018-04-25