diff --git a/src/calibre/gui2/dialogs/choose_library.ui b/src/calibre/gui2/dialogs/choose_library.ui
index 966b93b7b3..ea3cd98a92 100644
--- a/src/calibre/gui2/dialogs/choose_library.ui
+++ b/src/calibre/gui2/dialogs/choose_library.ui
@@ -59,13 +59,13 @@
-
-
- &Copy structure from the current library
-
Copy the custom columns, saved searches, column widths, plugboards,
user categories, and other information from the old to the new library
+
+ &Copy structure from the current library
+
@@ -138,7 +138,14 @@ user categories, and other information from the old to the new library
-
-
+
+
+ QComboBox::AdjustToMinimumContentsLength
+
+
+ 40
+
+