diff --git a/resources/js/ext.uls.ime.js b/resources/js/ext.uls.ime.js
index 97faa0de..12e7adb6 100644
--- a/resources/js/ext.uls.ime.js
+++ b/resources/js/ext.uls.ime.js
@@ -69,6 +69,8 @@
 				return;
 			}
 
+			// get updated copy of preferences
+			inputPreferences = mw.uls.preferences();
 			inputPreferences.set( 'ime', this.registry );
 			inputPreferences.save( callback );
 			// reset the dirty bit
diff --git a/resources/js/ext.uls.webfonts.js b/resources/js/ext.uls.webfonts.js
index 0ea538ed..03e1c32a 100644
--- a/resources/js/ext.uls.webfonts.js
+++ b/resources/js/ext.uls.webfonts.js
@@ -36,6 +36,8 @@
 		},
 
 		save: function ( callback ) {
+			// get updated copy of preferences
+			ulsPreferences = mw.uls.preferences();
 			ulsPreferences.set( 'webfonts', this.registry );
 			ulsPreferences.save( callback );
 		},