diff --git a/applications/utilities/preProcessing/mapFields/setTimeIndex.H b/applications/utilities/preProcessing/mapFields/setTimeIndex.H
new file mode 100644
index 0000000000..3a36340aaf
--- /dev/null
+++ b/applications/utilities/preProcessing/mapFields/setTimeIndex.H
@@ -0,0 +1,15 @@
+    label sourceTimeIndex = 0;
+    instantList sourceTimes = runTimeSource.times();
+    if (args.options().found("sourceTime"))
+    {
+        if ((args.options()["sourceTime"]) == "latestTime")
+        {
+            sourceTimeIndex = sourceTimes.size() - 1;
+        }
+        else
+        {
+            scalar sourceTime =
+                readScalar(IStringStream(args.options()["sourceTime"])());
+            sourceTimeIndex = getTimeIndex(sourceTimes, sourceTime);
+        }
+    }