diff --git a/manual/gui.rst b/manual/gui.rst
index 5179bc30b1..48871faa9f 100644
--- a/manual/gui.rst
+++ b/manual/gui.rst
@@ -281,7 +281,7 @@ Preferences
 
     1. **Preferences**: Allows you to change the way various aspects of calibre work. Clicking the button also performs this action.
     2. **Run welcome wizard**: Allows you to start the Welcome Wizard which appeared the first time you started calibre.
-    3. **Get plugins to enhance calibre**: Opens a new windows that shows plugins for calibre. These plugins are developed by third parties to extend calibre's functionality.
+    3. **Get plugins to enhance calibre**: Opens a new window that shows plugins for calibre. These plugins are developed by third parties to extend calibre's functionality.
     4. **Restart in debug mode**: Allows you to enable a debugging mode that can assist the calibre developers in solving problems you encounter with the program. For most users this should remain disabled unless instructed by a developer to enable it.
 
 .. _catalogs: