diff --git a/HISTORY.rst b/HISTORY.rst
index 6bf50f2c..b7831f00 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,6 +6,9 @@ History
 
 * Generate chunked ValueError fix
 * Proxy configuration by environment variables
+* Simplification of iter_lines.
+* New `trust_env` configuration for disabling system/environment hints.
+
 
 
 0.10.7 (2012-03-07)
diff --git a/requests/models.py b/requests/models.py
index 0da10ac7..0b4958eb 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -704,7 +704,7 @@ class Response(object):
 
         return gen
 
-    def iter_lines(self, decode_unicode=None):
+    def iter_lines(self, chunk_size=10 * 1024, decode_unicode=None):
         """Iterates over the response data, one line at a time.  This
         avoids reading the content at once into memory for large
         responses.
@@ -712,7 +712,9 @@ class Response(object):
 
         pending = None
 
-        for chunk in self.iter_content(chunk_size=10 * 1024, decode_unicode=decode_unicode):
+        for chunk in self.iter_content(
+            chunk_size=chunk_size,
+            decode_unicode=decode_unicode):
 
             if pending is not None:
                 chunk = pending + chunk