Fix a typo.

diff --git a/src/reference/extension_types.rst b/src/reference/extension_types.rst
index 7de243ae4ea4cadd07222f4211286d4baace6dae..0713acdcdc6746e323724df9654b3b2344aacdff 100644 (file)
--- a/src/reference/extension_types.rst
+++ b/src/reference/extension_types.rst
@@ -3,7 +3,7 @@
 .. _extension_types:
 
 ***************
-Extention Types
+Extension Types
 ***************
 
 * Normal Python as well as extension type classes can be defined.
@@ -338,7 +338,7 @@ Forward Declarations
 Extension Types and None
 ========================
 
-* Parameters and C-variables declared as an Extention type, may take the value of ``None``.
+* Parameters and C-variables declared as an Extension type, may take the value of ``None``.
 * This is analogous to the way a C-pointer can take the value of ``NULL``.
 
 .. note::