diff --git a/TestON/drivers/common/cli/emulator/mininetclidriver.py b/TestON/drivers/common/cli/emulator/mininetclidriver.py
index 38706b2..54d9747 100644
--- a/TestON/drivers/common/cli/emulator/mininetclidriver.py
+++ b/TestON/drivers/common/cli/emulator/mininetclidriver.py
@@ -574,7 +574,7 @@
 
             main.cleanAndExit()
 
-    def discoverIpv4Hosts( self, hostList, wait=1, dstIp="6.6.6.6" ):
+    def discoverIpv4Hosts( self, hostList, wait=1 , dstIp="6.6.6.6"):
         '''
         Can only be used if hosts already have ipv4 addresses.