diff --git a/cmake/waLBerlaFunctions.cmake b/cmake/waLBerlaFunctions.cmake
index f407ee34513a78a042a9f4d94282c7765dd25ab1..2bd75e087b8d2cea4da319e389b49a0c90957faa 100644
--- a/cmake/waLBerlaFunctions.cmake
+++ b/cmake/waLBerlaFunctions.cmake
@@ -254,7 +254,7 @@ endfunction ( waLBerla_compile_test )
 #                app or test folder:
 #                waLBerla_link_files_to_builddir( "*.prm" )
 #
-# Symlinking works only under linux, when using windows nothing happens.. 
+# Symlinking works only under linux, on windows the files are copied. For in-source builds this does nothing.
 #
 #######################################################################################################################