diff --git a/muranoclient/osc/v1/action.py b/muranoclient/osc/v1/action.py
index 0993bf6e..8d5dee08 100644
--- a/muranoclient/osc/v1/action.py
+++ b/muranoclient/osc/v1/action.py
@@ -51,7 +51,7 @@ class StaticActionCall(command.ShowOne):
         parser.add_argument(
             "--class-version",
             default='',
-            help='Optional version of the class, otherwise version 0.0.0 is '
+            help='Optional version of the class, otherwise version =0 is '
                  'used ',
         )
 
@@ -80,7 +80,7 @@ class StaticActionCall(command.ShowOne):
             "className": parsed_args.class_name,
             "methodName": parsed_args.method_name,
             "packageName": parsed_args.package_name or None,
-            "classVersion": parsed_args.class_version or '0.0.0',
+            "classVersion": parsed_args.class_version or '=0',
             "parameters": arguments
         }
 
diff --git a/muranoclient/tests/unit/test_shell.py b/muranoclient/tests/unit/test_shell.py
index 6d4d5e2c..4d394b34 100644
--- a/muranoclient/tests/unit/test_shell.py
+++ b/muranoclient/tests/unit/test_shell.py
@@ -543,7 +543,7 @@ class ShellCommandTest(ShellTest):
             "className": 'class.name',
             "methodName": 'method.name',
             "packageName": None,
-            "classVersion": '0.0.0',
+            "classVersion": '=0',
             "parameters": {}
         })
 
@@ -577,7 +577,7 @@ class ShellCommandTest(ShellTest):
             "className": 'class.name',
             "methodName": 'method.name',
             "packageName": None,
-            "classVersion": '0.0.0',
+            "classVersion": '=0',
             "parameters": {'food': 'spam', 'parrot': 'dead'}
         })
 
@@ -600,7 +600,7 @@ class ShellCommandTest(ShellTest):
             "className": 'class.name',
             "methodName": 'method.name',
             "packageName": None,
-            "classVersion": '0.0.0',
+            "classVersion": '=0',
             "parameters": {
                 'dictArg': {u'key1': u'value1', u'key2': u'value2'},
                 'listArg': [u'item1', u'item2', u'item3'],
diff --git a/muranoclient/v1/shell.py b/muranoclient/v1/shell.py
index c8edc4a2..ff83152d 100644
--- a/muranoclient/v1/shell.py
+++ b/muranoclient/v1/shell.py
@@ -223,7 +223,7 @@ def do_environment_action_get_result(mc, args):
 @utils.arg("--package-name", metavar='<PACKAGE>', default='',
            help='Optional FQN of the package to look for the class in')
 @utils.arg("--class-version", default='',
-           help='Optional version of the class, otherwise version 0.0.0 is '
+           help='Optional version of the class, otherwise version =0 is '
                 'used ')
 def do_static_action_call(mc, args):
     """Call static method `METHOD` of the class `CLASS` with `ARGUMENTS`.
@@ -251,7 +251,7 @@ def do_static_action_call(mc, args):
         "className": args.class_name,
         "methodName": args.method_name,
         "packageName": args.package_name or None,
-        "classVersion": args.class_version or '0.0.0',
+        "classVersion": args.class_version or '=0',
         "parameters": arguments
     }