diff --git a/django/contrib/localflavor/ca/forms.py b/django/contrib/localflavor/ca/forms.py
index daeff58acf..b40dba8335 100644
--- a/django/contrib/localflavor/ca/forms.py
+++ b/django/contrib/localflavor/ca/forms.py
@@ -80,12 +80,12 @@ class CASocialInsuranceNumberField(Field):
 
     Checks the following rules to determine whether the number is valid:
 
-        * Conforms to the XXX-XXX-XXXX format.
+        * Conforms to the XXX-XXX-XXX format.
         * Passes the check digit process "Luhn Algorithm"
              See: http://en.wikipedia.org/wiki/Social_Insurance_Number
     """
     default_error_messages = {
-        'invalid': ugettext('Enter a valid Canadian Social Insurance number in XXX-XXX-XXXX format.'),
+        'invalid': ugettext('Enter a valid Canadian Social Insurance number in XXX-XXX-XXX format.'),
     }
 
     def clean(self, value):
diff --git a/docs/localflavor.txt b/docs/localflavor.txt
index 154922ff45..fc227fee28 100644
--- a/docs/localflavor.txt
+++ b/docs/localflavor.txt
@@ -181,7 +181,7 @@ CASocialInsuranceNumberField
 ----------------------------
 
 A form field that validates input as a Canadian Social Insurance Number (SIN).
-A valid number must have the format XXX-XXX-XXXX and pass a `Luhn mod-10
+A valid number must have the format XXX-XXX-XXX and pass a `Luhn mod-10
 checksum`_.
 
 .. _Luhn mod-10 checksum: http://en.wikipedia.org/wiki/Luhn_algorithm
diff --git a/tests/regressiontests/forms/localflavor/ca.py b/tests/regressiontests/forms/localflavor/ca.py
index a13a6de65f..48171b0558 100644
--- a/tests/regressiontests/forms/localflavor/ca.py
+++ b/tests/regressiontests/forms/localflavor/ca.py
@@ -213,13 +213,13 @@ u'046-454-286'
 >>> f.clean('046-454-287')
 Traceback (most recent call last):
 ...
-ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXXX format.']
+ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXX format.']
 >>> f.clean('046 454 286')
 Traceback (most recent call last):
 ...
-ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXXX format.']
+ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXX format.']
 >>> f.clean('046-44-286')
 Traceback (most recent call last):
 ...
-ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXXX format.']
+ValidationError: [u'Enter a valid Canadian Social Insurance number in XXX-XXX-XXX format.']
 """