diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 1827fec..e69fbd3 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -6537,8 +6537,7 @@ find_help_tags(
 		    || (vim_strchr((char_u *)"%_z@", arg[1]) != NULL
 							   && arg[2] != NUL)))
 	{
-	    STRCPY(d, "/\\\\");
-	    STRCPY(d + 3, arg + 1);
+	    vim_snprintf((char *)d, IOSIZE, "/\\\\%s", arg + 1);
 	    /* Check for "/\\_$", should be "/\\_\$" */
 	    if (d[3] == '_' && d[4] == '$')
 		STRCPY(d + 4, "\\$");