diff --git a/README.md b/README.md
index 02b7f66..0a32770 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ images tied to email or OpenID addresses.
 * MD5 hashes
 * SHA256 hashes
 * Variable image size (`s` or `size`)
-* Default facllbacks (`d` or `default`): 404, URL, mp/mm, identicon
+* Default fallbacks (`d` or `default`): 404, URL, mp/mm, identicon
 
 The default behaviour for unknown users is to return a 404 error. You can change
 that by setting the environment variable `LIBRAVATARSERV_DEFAULT_FALLBACK` to
@@ -86,6 +86,8 @@ Default: empty
 **LIBRAVATARSERV_DEFAULT_FALLBACK**
 
 Controls what happens if no fallback was requested.
+Possible values: Anything that can be supplied with the `d` or `default`
+parameter.
 
 Default: 404