diff --git a/doc/src/errorcodes.rst b/doc/src/errorcodes.rst
index c6ec089d..499881d1 100644
--- a/doc/src/errorcodes.rst
+++ b/doc/src/errorcodes.rst
@@ -50,7 +50,7 @@ An example of the available constants defined in the module:
     '42P01'
 
 Constants representing all the error values documented by PostgreSQL versions
-between 8.1 and 9.0 are included in the module.
+between 8.1 and 9.1 are included in the module.
 
 
 .. autofunction:: lookup(code)