diff --git a/bin/wizard/__init__.py b/bin/wizard/__init__.py
index 093e2ce7fa4..394f4555b64 100644
--- a/bin/wizard/__init__.py
+++ b/bin/wizard/__init__.py
@@ -49,7 +49,7 @@ class interface(netsvc.Service):
 	states = {}
 	
 	def __init__(self, name):
-		assert not netsvc.service_exist('wizard.'+name), 'The wizard "%s" already exist!'%name
+		assert not netsvc.service_exist('wizard.'+name), 'The wizard "%s" already exists!'%name
 		super(interface, self).__init__('wizard.'+name)
 		self.exportMethod(self.execute)
 		self.wiz_name = name