diff --git a/src/calibre/gui2/dialogs/metadata_bulk.py b/src/calibre/gui2/dialogs/metadata_bulk.py
index 533a344de5..9239a0e136 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.py
+++ b/src/calibre/gui2/dialogs/metadata_bulk.py
@@ -764,6 +764,7 @@ class MetadataBulkDialog(ResizableDialog, Ui_MetadataBulkDialog):
     def initialize_series(self):
         all_series = self.db.all_series()
         all_series.sort(key=lambda x : sort_key(x[1]))
+        self.series.update_items_cache([x[1] for x in all_series])
 
         for i in all_series:
             id, name = i
@@ -773,6 +774,7 @@ class MetadataBulkDialog(ResizableDialog, Ui_MetadataBulkDialog):
     def initialize_publisher(self):
         all_publishers = self.db.all_publishers()
         all_publishers.sort(key=lambda x : sort_key(x[1]))
+        self.publisher.update_items_cache([x[1] for x in all_publishers])
 
         for i in all_publishers:
             id, name = i
diff --git a/src/calibre/gui2/dialogs/metadata_bulk.ui b/src/calibre/gui2/dialogs/metadata_bulk.ui
index b0f2c144fc..ecdb396662 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.ui
+++ b/src/calibre/gui2/dialogs/metadata_bulk.ui
@@ -76,7 +76,7 @@
             </widget>
            </item>
            <item row="0" column="1">
-            <widget class="CompleteComboBox" name="authors">
+            <widget class="MultiCompleteComboBox" name="authors">
              <property name="editable">
               <bool>true</bool>
              </property>
@@ -175,7 +175,7 @@
             </widget>
            </item>
            <item row="4" column="1">
-            <widget class="EnComboBox" name="publisher">
+            <widget class="MultiCompleteComboBox" name="publisher">
              <property name="editable">
               <bool>true</bool>
              </property>
@@ -195,7 +195,7 @@
             </widget>
            </item>
            <item row="5" column="1">
-            <widget class="CompleteLineEdit" name="tags">
+            <widget class="MultiCompleteLineEdit" name="tags">
              <property name="toolTip">
               <string>Tags categorize the book. This is particularly useful while searching. &lt;br&gt;&lt;br&gt;They can be any words or phrases, separated by commas.</string>
              </property>
@@ -229,7 +229,7 @@
             </widget>
            </item>
            <item row="6" column="1">
-            <widget class="CompleteLineEdit" name="remove_tags">
+            <widget class="MultiCompleteLineEdit" name="remove_tags">
              <property name="toolTip">
               <string>Comma separated list of tags to remove from the books. </string>
              </property>
@@ -262,7 +262,7 @@
             </widget>
            </item>
            <item row="7" column="1">
-            <widget class="EnComboBox" name="series">
+            <widget class="MultiCompleteComboBox" name="series">
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
                <horstretch>0</horstretch>
@@ -1072,19 +1072,14 @@ not multiple and the destination field is multiple</string>
    <header>widgets.h</header>
   </customwidget>
   <customwidget>
-   <class>EnComboBox</class>
+   <class>MultiCompleteComboBox</class>
    <extends>QComboBox</extends>
-   <header>widgets.h</header>
+   <header>calibre/gui2/complete.h</header>
   </customwidget>
   <customwidget>
-   <class>CompleteComboBox</class>
-   <extends>QComboBox</extends>
-   <header>widgets.h</header>
-  </customwidget>
-  <customwidget>
-   <class>CompleteLineEdit</class>
+   <class>MultiCompleteLineEdit</class>
    <extends>QLineEdit</extends>
-   <header>widgets.h</header>
+   <header>calibre/gui2/complete.h</header>
   </customwidget>
   <customwidget>
    <class>HistoryLineEdit</class>