diff --git a/org.hl7.fhir.r4/src/main/java/org/hl7/fhir/r4/model/Base.java b/org.hl7.fhir.r4/src/main/java/org/hl7/fhir/r4/model/Base.java
index c23f75996..b2b4e4ec4 100644
--- a/org.hl7.fhir.r4/src/main/java/org/hl7/fhir/r4/model/Base.java
+++ b/org.hl7.fhir.r4/src/main/java/org/hl7/fhir/r4/model/Base.java
@@ -326,6 +326,8 @@ private Map<String, Object> userData;
 	public DecimalType castToDecimal(Base b) throws FHIRException {
 		if (b instanceof DecimalType)
 			return (DecimalType) b;
+    else if (b.hasPrimitiveValue())
+      return new DecimalType(b.primitiveValue());
 		else
 			throw new FHIRException("Unable to convert a "+b.getClass().getName()+" to a Decimal");
 	}