diff --git a/tds/src/main/java/thredds/core/DatasetManager.java b/tds/src/main/java/thredds/core/DatasetManager.java
index a22d2c160b..aaaeca3911 100644
--- a/tds/src/main/java/thredds/core/DatasetManager.java
+++ b/tds/src/main/java/thredds/core/DatasetManager.java
@@ -399,7 +399,8 @@ public CoverageCollection openCoverageDataset(HttpServletRequest req, HttpServle
     // since the urlPath doesn't need to point to a file if there is ncml
     String ncml = datasetTracker.findNcml(reqPath);
     if (ncml != null) {
-      Optional<FeatureDatasetCoverage> opt = CoverageDatasetFactory.openNcmlString(ncml);
+      Optional<FeatureDatasetCoverage> opt =
+          CoverageDatasetFactory.openNcmlString(ncml, DatasetUrl.findDatasetUrl(reqPath).getTrueurl());
       if (!opt.isPresent())
         throw new FileNotFoundException("NcML is not a Grid Dataset " + reqPath + " err=" + opt.getErrorMessage());