diff --git a/lib/fluent/command/cap_ctl.rb b/lib/fluent/command/cap_ctl.rb
index 4a3af21933..6c6a817a5f 100644
--- a/lib/fluent/command/cap_ctl.rb
+++ b/lib/fluent/command/cap_ctl.rb
@@ -32,7 +32,7 @@ def prepare_option_parser
         @opts[:add_capabilities] = s
       }
 
-      @op.on('--drop [CAPABILITITY1,CAPABILITY2, ...]', "Drop capabilities into Fluentd Ruby") {|s|
+      @op.on('--drop [CAPABILITITY1,CAPABILITY2, ...]', "Drop capabilities from Fluentd Ruby") {|s|
         @opts[:drop_capabilities] = s
       }