diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.html b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.html
index ca94356c3c..514f3a9471 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.html
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.html
@@ -28,6 +28,7 @@ limitations under the License.
 <link rel="import" href="../../shared/gr-editable-label/gr-editable-label.html">
 <link rel="import" href="../../shared/gr-label/gr-label.html">
 <link rel="import" href="../../shared/gr-linked-chip/gr-linked-chip.html">
+<link rel="import" href="../../shared/gr-tooltip-content/gr-tooltip-content.html">
 <link rel="import" href="../../shared/gr-rest-api-interface/gr-rest-api-interface.html">
 <link rel="import" href="../gr-commit-info/gr-commit-info.html">
 <link rel="import" href="../gr-reviewer-list/gr-reviewer-list.html">
@@ -135,6 +136,13 @@ limitations under the License.
       .parentList gr-commit-info {
         display: inline-block;
       }
+      #parentNotCurrentMessage {
+        display: none;
+      }
+      .parentList.notCurrent.nonMerge #parentNotCurrentMessage {
+        --arrow-color: red;
+        display: inline-block;
+      }
       @media screen and (max-width: 50em), screen and (min-width: 75em) {
         :host {
           display: table;
@@ -236,13 +244,18 @@ limitations under the License.
       <section>
         <span class="title">[[_computeParentsLabel(_currentParents)]]</span>
         <span class="value">
-          <ol class$="[[_computeParentListClass(_currentParents)]]">
+          <ol class$="[[_computeParentListClass(_currentParents, parentIsCurrent)]]">
             <template is="dom-repeat" items="[[_currentParents]]" as="parent">
               <li>
                 <gr-commit-info
                     change="[[change]]"
                     commit-info="[[parent]]"
                     server-config="[[serverConfig]]"></gr-commit-info>
+                <gr-tooltip-content
+                    id="parentNotCurrentMessage"
+                    has-tooltip
+                    show-icon
+                    title$="[[_notCurrentMessage]]"></gr-tooltip-content>
               </li>
             </template>
           </ol>
diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.js b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.js
index 92763ee360..ddee577cb0 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.js
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.js
@@ -25,6 +25,8 @@
     CHERRY_PICK: 'Cherry Pick',
   };
 
+  const NOT_CURRENT_MESSAGE = 'Not current - rebase possible';
+
   Polymer({
     is: 'gr-change-metadata',
 
@@ -46,6 +48,12 @@
        * @type {{ note_db_enabled: string }}
        */
       serverConfig: Object,
+      parentIsCurrent: Boolean,
+      _notCurrentMessage: {
+        type: String,
+        value: NOT_CURRENT_MESSAGE,
+        readOnly: true,
+      },
       _topicReadOnly: {
         type: Boolean,
         computed: '_computeTopicReadOnly(mutable, change)',
@@ -425,8 +433,12 @@
       return parents.length > 1 ? 'Parents' : 'Parent';
     },
 
-    _computeParentListClass(parents) {
-      return parents.length > 1 ? 'parentList merge' : 'parentList';
+    _computeParentListClass(parents, parentIsCurrent) {
+      return [
+        'parentList',
+        parents.length > 1 ? 'merge' : 'nonMerge',
+        parentIsCurrent ? 'current' : 'notCurrent',
+      ].join(' ');
     },
   });
 })();
diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_test.html b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_test.html
index f6d020e206..9ee09eac83 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_test.html
@@ -336,6 +336,18 @@ limitations under the License.
           'Parents');
     });
 
+    test('_computeParentListClass', () => {
+      const parent = {commit: 'abc123', subject: 'My parent commit'};
+      assert.equal(element._computeParentListClass([parent], true),
+          'parentList nonMerge current');
+      assert.equal(element._computeParentListClass([parent], false),
+          'parentList nonMerge notCurrent');
+      assert.equal(element._computeParentListClass([parent, parent], false),
+          'parentList merge notCurrent');
+      assert.equal(element._computeParentListClass([parent, parent], true),
+          'parentList merge current');
+    });
+
     test('_showAddTopic', () => {
       assert.isTrue(element._showAddTopic(null, false));
       assert.isTrue(element._showAddTopic({base: {topic: null}}, false));
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
index 7db2bc45bf..7e661c75f5 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
@@ -370,6 +370,7 @@ limitations under the License.
               server-config="[[_serverConfig]]"
               missing-labels="[[_missingLabels]]"
               mutable="[[_loggedIn]]"
+              parent-is-current="[[!_rebaseOriginallyEnabled]]"
               on-show-reply-dialog="_handleShowReplyDialog">
           </gr-change-metadata>
           <!-- Plugins insert content into following container.
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
index 9cf029b106..fd9a490c84 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
@@ -224,6 +224,7 @@
         value: false,
         observer: '_updateToggleContainerClass',
       },
+      _rebaseOriginallyEnabled: Boolean,
     },
 
     behaviors: [
@@ -937,6 +938,7 @@
       if (revisionActions && revisionActions.rebase) {
         revisionActions.rebase.rebaseOnCurrent =
             !!revisionActions.rebase.enabled;
+        this._rebaseOriginallyEnabled = !!revisionActions.rebase.enabled;
         revisionActions.rebase.enabled = true;
       }
       return revisionActions;
diff --git a/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.html b/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.html
index e80cbe53cf..68db696869 100644
--- a/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.html
+++ b/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.html
@@ -19,6 +19,11 @@ limitations under the License.
 
 <dom-module id="gr-tooltip-content">
   <template>
+    <style>
+      .arrow {
+        color: var(--arrow-color);
+      }
+    </style>
     <slot></slot><!--
  --><span class="arrow" hidden$="[[!showIcon]]">&#9432;</span>
   </template>