diff --git a/Modules/Wrappers/ApplicationEngine/src/otbWrapperMapProjectionParametersHandler.cxx b/Modules/Wrappers/ApplicationEngine/src/otbWrapperMapProjectionParametersHandler.cxx
index 493191677c554686770604ca734effe4017c3784..a4d4557c6d58dad4cdd47bec748822eac41d2ffd 100644
--- a/Modules/Wrappers/ApplicationEngine/src/otbWrapperMapProjectionParametersHandler.cxx
+++ b/Modules/Wrappers/ApplicationEngine/src/otbWrapperMapProjectionParametersHandler.cxx
@@ -50,7 +50,7 @@ void MapProjectionParametersHandler::AddMapProjectionParameters( Application::Po
 
   oss.str("");
   oss <<key<<".utm" <<".northhem";
-  app->AddParameter(ParameterType_Empty, oss.str(),  "Northern Hemisphere");
+  app->AddParameter(ParameterType_Bool, oss.str(),  "Northern Hemisphere");
   app->SetParameterDescription(oss.str(),"The transverse mercator projections are defined by their zone number as well as the hemisphere. Activate this parameter if your image is in the northern hemisphere.");