diff --git a/modules/TDEMacros.cmake b/modules/TDEMacros.cmake
index f4f3b4f..07f161f 100644
--- a/modules/TDEMacros.cmake
+++ b/modules/TDEMacros.cmake
@@ -1898,7 +1898,7 @@ macro( tde_create_translated_desktop )
     file( MAKE_DIRECTORY "${_binary_basedir}" )
 
     # process source file as a configuration file if necessary
-    if( "${_src}" MATCHES "\\.cmake$" )
+    if( "+${_src}" MATCHES "\\.cmake$" )
       configure_file( ${_src} ${_basename} @ONLY )
       set( _src "${CMAKE_CURRENT_BINARY_DIR}/${_basename}" )
       string( REGEX REPLACE "\\.cmake$" "" _basename "${_basename}" )