diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a8ece22c9cd9..0d3373881b0f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5,7 +5,7 @@ isPy26 = python.majorVersion == "2.6";
 isPy27 = python.majorVersion == "2.7";
 optional = pkgs.lib.optional;
 optionals = pkgs.lib.optionals;
-modules = python.modules or { readline = null; sqlite3 = null; curses = null; ssl = null; };
+modules = python.modules or { readline = null; sqlite3 = null; curses = null; ssl = null; crypto = null};
 
 pythonPackages = modules // import ./python-packages-generated.nix {
   inherit pkgs python;