diff --git a/requests/models.py b/requests/models.py
index ae46a831..72b0fec8 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -693,7 +693,7 @@ class Response(object):
         If Response.encoding is None, encoding will be guessed using
         ``chardet``.
 
-        The encoding of the response content is determined based soley on HTTP
+        The encoding of the response content is determined based solely on HTTP
         headers, following RFC 2616 to the letter. If you can take advantage of
         non-HTTP knowledge to make a better guess at the encoding, you should
         set ``r.encoding`` appropriately before accessing this property.