diff --git a/dev/fixdosfiles.sh b/dev/fixdosfiles.sh
index 30d47e7b0c4..5efd4b58543 100755
--- a/dev/fixdosfiles.sh
+++ b/dev/fixdosfiles.sh
@@ -10,6 +10,7 @@
 # Syntax
 if [ "x$1" != "xlist" -a "x$1" != "xfix" ]
 then
+	echo "This script clean files with CR+LF into files with LF only. All source files are included, also files into includes."
 	echo "Usage: fixdosfiles.sh [list|fix]"
 fi