diff --git a/records.py b/records.py
index c791b60..704c830 100644
--- a/records.py
+++ b/records.py
@@ -20,7 +20,7 @@ class Record(object):
         self._keys = keys
         self._values = values
 
-        # Esure that lengths match properly.
+        # Ensure that lengths match properly.
         assert len(self._keys) == len(self._values)
 
     def keys(self):