diff --git a/pisi/build.py b/pisi/build.py
index 0ada4088..9445b87d 100644
--- a/pisi/build.py
+++ b/pisi/build.py
@@ -124,6 +124,7 @@ class PisiBuild:
         os.environ.update(evn)
 
     def compileActionScript(self):
+        """Compiles actions.py and sets the actionLocals and actionGlobals"""
         specdir = os.path.dirname(self.ctx.pspecfile)
         scriptfile = os.path.join(specdir, const.actions_file)
         try: