diff --git a/docs/sphinx/conf.py b/docs/sphinx/conf.py
index dc83e263..705c6b7e 100644
--- a/docs/sphinx/conf.py
+++ b/docs/sphinx/conf.py
@@ -131,11 +131,6 @@ TaskGen.before('process_source','process_rule')(TaskGen.process_subst)
 
 from waflib.Task import Task
 
-Task.__dict__['run'].__doc__ = """
-		Execute the task (executed by threads). Override in subclasses.
-
-		:rtype: int
-		"""
 Task.__dict__['post_run'].__doc__ = "Update the cache files (executed by threads). Override in subclasses."