diff --git a/core/modules/book/book.install b/core/modules/book/book.install
index 7c0893e..2293c46 100644
--- a/core/modules/book/book.install
+++ b/core/modules/book/book.install
@@ -88,7 +88,7 @@ function book_schema() {
 }
 
 /**
- * Moves book settings from variables to config.
+ * Move book settings from variables to config.
  *
  * @ingroup config_upgrade
  */