diff --git a/runtime/doc/usr_05.txt b/runtime/doc/usr_05.txt
index 3a7438d..51e43df 100644
--- a/runtime/doc/usr_05.txt
+++ b/runtime/doc/usr_05.txt
@@ -270,7 +270,7 @@
 Enable using the mouse if available.  See 'mouse'.
 
 >
-	vnoremap _g y:exe "grep /" . escape(@", '\\/') . "/ *.c *.h"<CR>
+	vnoremap _g y:exe "grep /" .. escape(@", '\\/') .. "/ *.c *.h"<CR>
 
 This mapping yanks the visually selected text and searches for it in C files.
 You can see that a mapping can be used to do quite complicated things.  Still,