diff --git a/local/share/check_mk/agents/special/agent_mailcow b/local/share/check_mk/agents/special/agent_mailcow
index b34f409..d4d36c8 100755
--- a/local/share/check_mk/agents/special/agent_mailcow
+++ b/local/share/check_mk/agents/special/agent_mailcow
@@ -89,7 +89,7 @@ def debugLog(function):
         out2 = ""
         for arg in args:
             out2 = out2 + SEP + str(arg)
-        # out 3: all keyword arguments
+        # out3: all keyword arguments
         out3 = ""
         if len_kwargs > 0:
             for key, val in kwargs.items():
diff --git a/local/share/check_mk/web/plugins/wato/mailcow_params.py b/local/share/check_mk/web/plugins/wato/mailcow_params.py
index 115340c..ad18a07 100644
--- a/local/share/check_mk/web/plugins/wato/mailcow_params.py
+++ b/local/share/check_mk/web/plugins/wato/mailcow_params.py
@@ -2,7 +2,14 @@ from cmk.gui.i18n import _
 from cmk.gui.plugins.wato import (
     CheckParameterRulespecWithItem,
     rulespec_registry,
-    RulespecGroupCheckParametersOperatingSystem,
+)
+
+from cmk.gui.plugins.wato.special_agents.common import (
+    RulespecGroupDatasourceProgramsApps,
+    RulespecGroupDatasourceProgramsCustom,
+    RulespecGroupDatasourceProgramsHardware,
+    RulespecGroupDatasourceProgramsOS,
+    RulespecGroupDatasourceProgramsTesting,
 )
 
 from cmk.gui.valuespec import (
@@ -43,7 +50,7 @@ def _valuespec_special_agent_mailcow():
 
 rulespec_registry.register(
     HostRulespec(
-        group=RulespecGroupDatasourceProgramsCustom,
+        group=RulespecGroupDatasourceProgramsApps,
         name="special_agents:mailcow",
         valuespec=_valuespec_special_agent_mailcow,
     )