diff --git a/i18n/CMakeLists.txt b/i18n/CMakeLists.txt
index efd5fcaf0dd7cc22a4c28773ec9db24bde082c5b..5aa39ee48e0c1fcbce0a7a1ad523641ca45f2af9 100644
--- a/i18n/CMakeLists.txt
+++ b/i18n/CMakeLists.txt
@@ -35,6 +35,7 @@ option( OTB_I18N_MERGE_TS
   "Create/merge .ts source translation files. WARNING: If ON, 'make clean' will delete the .ts files from source directory!"
   OFF
   )
+mark_as_advanced( OTB_I18N_MERGE_TS )
 
 #----------------------------------------------------------------------------
 if( OTBQt_ENABLED )