diff --git a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/conv10_40/Condition10_40.java b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/conv10_40/Condition10_40.java
index 07eee6434..acb32181e 100644
--- a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/conv10_40/Condition10_40.java
+++ b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/conv10_40/Condition10_40.java
@@ -65,7 +65,7 @@ public class Condition10_40 {
             tgt.setSeverity(VersionConvertor_10_40.convertCodeableConcept(src.getSeverity()));
         if (src.hasOnset())
             tgt.setOnset(VersionConvertor_10_40.convertType(src.getOnset()));
-        if (src.hasAbatement())
+        if (src.hasAbatement() && !(src.getAbatement() instanceof org.hl7.fhir.dstu2.model.BooleanType))
             tgt.setAbatement(VersionConvertor_10_40.convertType(src.getAbatement()));
         if (src.hasStage())
             tgt.addStage(convertConditionStageComponent(src.getStage()));