diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditScreen.ui.xml b/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditScreen.ui.xml
index 342cd77..93c3bb9 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditScreen.ui.xml
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditScreen.ui.xml
@@ -17,12 +17,18 @@
 <ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
     xmlns:g='urn:import:com.google.gwt.user.client.ui'>
   <ui:style>
+    @external .CodeMirror, .CodeMirror-cursor;
+
     .header {
       position: relative;
       height: 16px;
       line-height: 16px;
     }
 
+    .header .CodeMirror div.CodeMirror-cursor {
+      border-left: 2px solid black;
+    }
+
     .headerLine {
       background-color: #f7f7f7;
       border-bottom: 1px solid #ddd;