diff --git a/doc/sphinx/_doclib/upgrading.rst b/doc/sphinx/_doclib/upgrading.rst
index b7ec2da77abbd6f1a9282179fbb0a91f4717dad7..15d3db7212674265cd90fe60f005a573f92ea498 100644
--- a/doc/sphinx/_doclib/upgrading.rst
+++ b/doc/sphinx/_doclib/upgrading.rst
@@ -105,7 +105,7 @@ to quickly turn maintenance mode ON/OFF. Upgrading steps are then much more simp
 Upgrading to Mentat 2.8
 --------------------------------------------------------------------------------
 
-* Rulesets for two inspectors have been merged in to one instance. That
+* Rulesets for two inspectors have been merged into one instance. That
   concerns mentat-inspector.py, mentat-inspector-b.py.conf and
   mentat-controller.py.conf. If you use vanilla configuration from .deb,
   package manager will replace the old configuration files with new ones