diff --git a/runtime/doc/ft_rust.txt b/runtime/doc/ft_rust.txt
index c2e21e4..71e3027 100644
--- a/runtime/doc/ft_rust.txt
+++ b/runtime/doc/ft_rust.txt
@@ -116,13 +116,13 @@
 
                                                           *g:rust_playpen_url*
 g:rust_playpen_url~
-	Set this option to override the url for the playpen to use: >
+	Set this option to override the URL for the playpen to use: >
 	    let g:rust_playpen_url = 'https://play.rust-lang.org/'
 <
 
                                                         *g:rust_shortener_url*
 g:rust_shortener_url~
-	Set this option to override the url for the url shortener: >
+	Set this option to override the URL for the URL shortener: >
 	    let g:rust_shortener_url = 'https://is.gd/'
 <
 
@@ -199,7 +199,7 @@
 		|g:rust_playpen_url| is the base URL to the playpen, by default
 		"https://play.rust-lang.org/".
 
-		|g:rust_shortener_url| is the base url for the shorterner, by
+		|g:rust_shortener_url| is the base URL for the shorterner, by
 		default "https://is.gd/"
 
 :RustFmt                                                       *:RustFmt*