diff --git a/src/Generator/Generators/CLI/CLITypePrinter.cs b/src/Generator/Generators/CLI/CLITypePrinter.cs
index 05b6852e..19f669a7 100644
--- a/src/Generator/Generators/CLI/CLITypePrinter.cs
+++ b/src/Generator/Generators/CLI/CLITypePrinter.cs
@@ -128,7 +128,7 @@ namespace Cxxi.Generators.CLI
             str += type;
 
             if(param.Usage == ParameterUsage.Out ||
-               param.Usage == ParameterUsage.Ref)
+               param.Usage == ParameterUsage.InOut)
                 str += "%";
                    
             if (hasName && !string.IsNullOrEmpty(name))