diff --git a/tools/dev/mininet/onos.py b/tools/dev/mininet/onos.py
index 15232ac..f8a0d03 100755
--- a/tools/dev/mininet/onos.py
+++ b/tools/dev/mininet/onos.py
@@ -398,7 +398,7 @@
             if nodeStr in result:
                 break
 
-			# just break if state is active 
+            # just break if state is active
             if "state=ACTIVE" in result:
                 break