diff --git a/zunclient/common/utils.py b/zunclient/common/utils.py
index c8a75084..2fb85fae 100644
--- a/zunclient/common/utils.py
+++ b/zunclient/common/utils.py
@@ -203,6 +203,8 @@ def list_availability_zones(zones):
 def parse_command(command):
     output = []
     if command:
+        if isinstance(command, six.string_types):
+            command = [command]
         for c in command:
             c = '"' + c + '"'
             output.append(c)