diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/JsonParser.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/JsonParser.java
index a8fdb0d6f..c94c46735 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/JsonParser.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/JsonParser.java
@@ -243,6 +243,9 @@ public class JsonParser extends ParserBase {
     if (e instanceof JsonObject) {
       return "an object";
     }
+    if (e instanceof JsonNull) {
+      return "null";
+    }
     return "a primitive property";
   }