diff --git a/manifests/commands/definition_rules.pp b/manifests/commands/definition_rules.pp
index d83c4c7..ae7e39e 100644
--- a/manifests/commands/definition_rules.pp
+++ b/manifests/commands/definition_rules.pp
@@ -79,7 +79,7 @@ class confdroid_nrpe::commands::definition_rules (
     confdroid_nrpe::commands::definitions { 'check_alloy':
       ne_check_name    => 'check_alloy',
       ne_check_cmd     => 'check_procs',
-      ne_cmd_argstring => '-c $ARG1$ -a $ARG2$',
+      ne_cmd_argstring => '-c $ARG1$ -C $ARG2$',
     }
   }
 }