diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/test/utils/CompareUtilities.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/test/utils/CompareUtilities.java
index f1744648e..6eaa0dd6d 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/test/utils/CompareUtilities.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/test/utils/CompareUtilities.java
@@ -316,7 +316,7 @@ public class CompareUtilities extends BaseTestingUtilities {
           if (i == expectedArray.size() - 1 && isOptional(expectedArray.get(i))) {
             return null; // this is OK 
           } else {
-            return "One or more array items did not match at "+path;
+            return "One or more array items did not match at "+path+" starting at index "+i;
           }
         }
         String s = compareNodes(path + "[" + Integer.toString(i) + "]", expectedArray.get(i), actualArray.get(c));