diff --git a/runtime/syntax/shared/README.txt b/runtime/syntax/shared/README.txt
new file mode 100644
index 0000000..f519d44
--- /dev/null
+++ b/runtime/syntax/shared/README.txt
@@ -0,0 +1,2 @@
+This directory "runtime/syntax/shared" contains Vim script files that are
+generated or used by more then one syntax file.