diff --git a/mongoengine/fields.py b/mongoengine/fields.py
index b5ed8bb2..dbed6b99 100644
--- a/mongoengine/fields.py
+++ b/mongoengine/fields.py
@@ -997,7 +997,7 @@ class ReferenceField(BaseField):
 class CachedReferenceField(BaseField):
 
     """
-    A referencefield with cache fields to porpuse pseudo-joins
+    A referencefield with cache fields to purpose pseudo-joins
     .. versionadded:: 0.9
     """