diff --git a/QtUtils.cmake b/QtUtils.cmake
index e5a5f5a..7941b55 100644
--- a/QtUtils.cmake
+++ b/QtUtils.cmake
@@ -44,7 +44,7 @@ function(prepareQM name sourceDir ts_files)
     foreach(_ts_file ${ts_files})
 
         execute_process(
-            COMMAND ${LUPDATE_EXECUTABLE} -locations none -recursive ${sourceDir} -ts ${_ts_file})
+            COMMAND ${LUPDATE_EXECUTABLE} -no-obsolete -locations none -recursive ${sourceDir} -ts ${_ts_file})
         execute_process(
             COMMAND ${LRELEASE_EXECUTABLE} ${_ts_file})