diff --git a/after/ftplugin/cmake.vim b/after/ftplugin/cmake.vim
index 2095f62..25c8833 100644
--- a/after/ftplugin/cmake.vim
+++ b/after/ftplugin/cmake.vim
@@ -14,3 +14,7 @@
 setlocal foldmethod=indent
 " Set comment string
 setlocal commentstring=#%s
+
+" Custon surround for creating a CMake variable from a text object.
+" "ys{motion}v" makes a variable out of "<text-obj>" - > "${<text-obj>}"
+autocmd FileType cmake let b:surround_{char2nr("v")} = "${\r}"