diff --git a/api/src/org/labkey/api/qc/TsvDataExchangeHandler.java b/api/src/org/labkey/api/qc/TsvDataExchangeHandler.java
index 8060e132f95..924b731bb8d 100644
--- a/api/src/org/labkey/api/qc/TsvDataExchangeHandler.java
+++ b/api/src/org/labkey/api/qc/TsvDataExchangeHandler.java
@@ -118,6 +118,7 @@ public enum Props {
         protocolId,             // protocol row id
         protocolLsid,
         protocolDescription,
+        reRunId,                // row id of the run being replaced, only present for a re-import
 
         runDataFile,
         runDataUploadedFile,
@@ -491,6 +492,14 @@ private Map<String, String> getContextProperties(DataTransformService.TransformO
             FileLike originalFileLocation = context.getOriginalFileLocation();
             if (originalFileLocation != null)
                 map.put(Props.originalFileLocation.name(), originalFileLocation.toNioPathForRead().toFile().getPath());
+
+            // Note: the replaced run isn't marked as replaced until after the transform, this is the RowId of the run that is being re-imported
+            if (!(context instanceof SampleRunUploadContext))
+            {
+                Long reRunId = context.getReRunId();
+                if (reRunId != null)
+                    map.put(Props.reRunId.name(), String.valueOf(reRunId));
+            }
         }
 
         map.put(Props.baseUrl.name(), AppProps.getInstance().getBaseServerUrl() + AppProps.getInstance().getContextPath());