diff --git a/src/Hl7.Fhir.Base/ElementModel/SourceNodeExtensions.cs b/src/Hl7.Fhir.Base/ElementModel/SourceNodeExtensions.cs
index ac98b4c8c1..dc941d5272 100644
--- a/src/Hl7.Fhir.Base/ElementModel/SourceNodeExtensions.cs
+++ b/src/Hl7.Fhir.Base/ElementModel/SourceNodeExtensions.cs
@@ -170,6 +170,14 @@ public static string GetResourceTypeIndicator(this ISourceNode node) =>
///
public static IEnumerable