diff --git a/hapi-fhir-structures-dstu2.1/src/main/java/org/hl7/fhir/dstu2016may/model/BaseDateTimeType.java b/hapi-fhir-structures-dstu2.1/src/main/java/org/hl7/fhir/dstu2016may/model/BaseDateTimeType.java
index a6287815483..838d583d8f1 100644
--- a/hapi-fhir-structures-dstu2.1/src/main/java/org/hl7/fhir/dstu2016may/model/BaseDateTimeType.java
+++ b/hapi-fhir-structures-dstu2.1/src/main/java/org/hl7/fhir/dstu2016may/model/BaseDateTimeType.java
@@ -177,7 +177,7 @@ public abstract class BaseDateTimeType extends PrimitiveType<Date> {
 	 */
 	public TimeZone getTimeZone() {
 		if (myTimeZoneZulu) {
-			return TimeZone.getTimeZone("Z");
+			return TimeZone.getTimeZone("GMT");
 		}
 		return myTimeZone;
 	}