diff --git a/gerrit-common/src/main/java/com/google/gerrit/common/data/PatchScript.java b/gerrit-common/src/main/java/com/google/gerrit/common/data/PatchScript.java
index 046df1d4d9..7bab43ab96 100644
--- a/gerrit-common/src/main/java/com/google/gerrit/common/data/PatchScript.java
+++ b/gerrit-common/src/main/java/com/google/gerrit/common/data/PatchScript.java
@@ -57,6 +57,8 @@ public class PatchScript {
   protected boolean intralineFailure;
   protected boolean intralineTimeout;
   protected boolean binary;
+  protected transient String commitIdA;
+  protected transient String commitIdB;
 
   public PatchScript(final Change.Key ck, final ChangeType ct, final String on,
       final String nn, final FileMode om, final FileMode nm,
@@ -65,7 +67,8 @@ public class PatchScript {
       final List<Edit> e, final DisplayMethod ma, final DisplayMethod mb,
       final String mta, final String mtb, final CommentDetail cd,
       final List<Patch> hist, final boolean hf, final boolean id,
-      final boolean idf, final boolean idt, boolean bin) {
+      final boolean idf, final boolean idt, boolean bin,
+      final String cma, final String cmb) {
     changeId = ck;
     changeType = ct;
     oldName = on;
@@ -88,6 +91,8 @@ public class PatchScript {
     intralineFailure = idf;
     intralineTimeout = idt;
     binary = bin;
+    commitIdA = cma;
+    commitIdB = cmb;
   }
 
   protected PatchScript() {
@@ -200,4 +205,12 @@ public class PatchScript {
   public boolean isBinary() {
     return binary;
   }
+
+  public String getCommitIdA() {
+    return commitIdA;
+  }
+
+  public String getCommitIdB() {
+    return commitIdB;
+  }
 }
diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/common/DiffInfo.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/common/DiffInfo.java
index 62b1dc7a0f..58b2d390ab 100644
--- a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/common/DiffInfo.java
+++ b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/common/DiffInfo.java
@@ -42,6 +42,8 @@ public class DiffInfo {
   }
 
   public static class FileMeta {
+    // The ID of the commit containing the file
+    public transient String commitId;
     // The name of the file
     public String name;
     // The content type of the file
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/GetDiff.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/GetDiff.java
index 8e3a5d142d..eef0533b06 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/GetDiff.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/GetDiff.java
@@ -201,6 +201,7 @@ public class GetDiff implements RestReadView<FileResource> {
           result.metaA.lines = ps.getA().size();
           result.metaA.webLinks =
               getFileWebLinks(state.getProject(), revA, result.metaA.name);
+          result.metaA.commitId = content.commitIdA;
         }
 
         if (ps.getDisplayMethodB() != DisplayMethod.NONE) {
@@ -211,6 +212,7 @@ public class GetDiff implements RestReadView<FileResource> {
           result.metaB.lines = ps.getB().size();
           result.metaB.webLinks =
               getFileWebLinks(state.getProject(), revB, result.metaB.name);
+          result.metaB.commitId = content.commitIdB;
         }
 
         if (intraline) {
@@ -264,6 +266,8 @@ public class GetDiff implements RestReadView<FileResource> {
     final SparseFileContent fileA;
     final SparseFileContent fileB;
     final boolean ignoreWS;
+    final String commitIdA;
+    final String commitIdB;
 
     int nextA;
     int nextB;
@@ -273,6 +277,8 @@ public class GetDiff implements RestReadView<FileResource> {
       fileA = ps.getA();
       fileB = ps.getB();
       ignoreWS = ps.isIgnoreWhitespace();
+      commitIdA = ps.getCommitIdA();
+      commitIdB = ps.getCommitIdB();
     }
 
     void addCommon(int end) {
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/patch/PatchScriptBuilder.java b/gerrit-server/src/main/java/com/google/gerrit/server/patch/PatchScriptBuilder.java
index edbd9ebc48..5b70730737 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/patch/PatchScriptBuilder.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/patch/PatchScriptBuilder.java
@@ -214,7 +214,9 @@ class PatchScriptBuilder {
         a.displayMethod, b.displayMethod, a.mimeType.toString(),
         b.mimeType.toString(), comments, history, hugeFile,
         intralineDifferenceIsPossible, intralineFailure, intralineTimeout,
-        content.getPatchType() == Patch.PatchType.BINARY);
+        content.getPatchType() == Patch.PatchType.BINARY,
+        aId == null ? null : aId.getName(),
+        bId == null ? null : bId.getName());
   }
 
   private static boolean isModify(PatchListEntry content) {