diff --git a/src/pyschedule/pyschedule.py b/src/pyschedule/pyschedule.py
index c8a7e24..e62e383 100644
--- a/src/pyschedule/pyschedule.py
+++ b/src/pyschedule/pyschedule.py
@@ -1227,7 +1227,7 @@ def __ge__(self,other) :
 
 	def __str__(self):
 		param = self._param
-		if self.name is not None and self.name is not '':
+		if self.name is not None and self.name != '':
 			param = self.name
 		slice = ''
 		if self._start is not None or self._end is not None: