diff --git a/CHANGELOG b/CHANGELOG
index abf009952571..e0203359891d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2730,7 +2730,7 @@
 2007-02-12 Moved data files into lib/matplotlib so that setuptools'
            develop mode works. Re-organized the mpl-data layout so
            that this source structure is maintained in the
-           installation. (I.e. the 'fonts' and 'images'
+           installation. (i.e., the 'fonts' and 'images'
            sub-directories are maintained in site-packages.)  Suggest
            removing site-packages/matplotlib/mpl-data and
            ~/.matplotlib/ttffont.cache before installing - ADS
diff --git a/doc/api/api_changes.rst b/doc/api/api_changes.rst
index 5449ce61827a..be878d0a7dc7 100644
--- a/doc/api/api_changes.rst
+++ b/doc/api/api_changes.rst
@@ -1339,7 +1339,7 @@ Changes for 0.90.1
 
     Moved data files into lib/matplotlib so that setuptools' develop
     mode works. Re-organized the mpl-data layout so that this source
-    structure is maintained in the installation. (I.e. the 'fonts' and
+    structure is maintained in the installation. (i.e., the 'fonts' and
     'images' sub-directories are maintained in site-packages.).
     Suggest removing site-packages/matplotlib/mpl-data and
     ~/.matplotlib/ttffont.cache before installing