diff --git a/pkgs/development/python-modules/autopep8/default.nix b/pkgs/development/python-modules/autopep8/default.nix
index 9a177d7b4936..4bfffd8a780b 100644
--- a/pkgs/development/python-modules/autopep8/default.nix
+++ b/pkgs/development/python-modules/autopep8/default.nix
@@ -40,6 +40,7 @@ buildPythonPackage rec {
     description = "A tool that automatically formats Python code to conform to the PEP 8 style guide";
     homepage = "https://github.com/hhatto/autopep8";
     license = licenses.mit;
+    mainProgram = "autopep8";
     maintainers = with maintainers; [ bjornfor ];
   };
 }