diff --git a/docs/changelog.rst b/docs/changelog.rst
index 0f86a629..3a397524 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -9,7 +9,7 @@ Changes in 0.8.2
 - Fixed cascading saves which weren't turned off as planned (#291)
 - Fixed Datastructures so instances are a Document or EmbeddedDocument (#363)
 - Improved cascading saves write performance (#361)
-- Fixed amibiguity and differing behaviour regarding field defaults (#349)
+- Fixed ambiguity and differing behaviour regarding field defaults (#349)
 - ImageFields now include PIL error messages if invalid error (#353)
 - Added lock when calling doc.Delete() for when signals have no sender (#350)
 - Reload forces read preference to be PRIMARY (#355)
diff --git a/docs/guide/defining-documents.rst b/docs/guide/defining-documents.rst
index b3b1e592..a61d8fe8 100644
--- a/docs/guide/defining-documents.rst
+++ b/docs/guide/defining-documents.rst
@@ -450,8 +450,8 @@ by creating a list of index specifications called :attr:`indexes` in the
 :attr:`~mongoengine.Document.meta` dictionary, where an index specification may
 either be a single field name, a tuple containing multiple field names, or a
 dictionary containing a full index definition. A direction may be specified on
-fields by prefixing the field name with a **+** or a **-** sign. Note that
-direction only matters on multi-field indexes. ::
+fields by prefixing the field name with a **+** (for ascending) or a **-** sign
+(for descending). Note that direction only matters on multi-field indexes. ::
 
     class Page(Document):
         title = StringField()