diff --git a/source/aggregation.txt b/source/aggregation.txt
index 583d0b78a4a..0e9a0bd5ff6 100644
--- a/source/aggregation.txt
+++ b/source/aggregation.txt
@@ -5,7 +5,7 @@ Aggregation
 ===========
 
 The :ref:`Aggregation framework <aggregation-framework>` provides
-a natural method for aggregating data insides of MongoDB. This manual
+a natural method for aggregating data inside of MongoDB. This manual
 contains documentation of both :doc:`aggregation itself
 </applications/aggregation>` and the :doc:`aggregation operators
 </reference/aggregation>`, as well as a collection of :doc:`example