diff --git a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SimpleForeignKeyDescriptor.java b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SimpleForeignKeyDescriptor.java
index 4b2282266c..f85d153106 100644
--- a/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SimpleForeignKeyDescriptor.java
+++ b/hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/SimpleForeignKeyDescriptor.java
@@ -424,7 +424,7 @@ public class SimpleForeignKeyDescriptor implements ForeignKeyDescriptor, BasicVa
 
 	@Override
 	public Object disassemble(Object value, SharedSessionContractImplementor session) {
-		return value;
+		return getJdbcMapping().convertToRelationalValue( value );
 	}
 
 	@Override
@@ -460,7 +460,7 @@ public class SimpleForeignKeyDescriptor implements ForeignKeyDescriptor, BasicVa
 
 	@Override
 	public void breakDownJdbcValues(Object domainValue, JdbcValueConsumer valueConsumer, SharedSessionContractImplementor session) {
-		valueConsumer.consume( domainValue, keySide.getModelPart() );
+		valueConsumer.consume( disassemble( domainValue, session ), keySide.getModelPart() );
 	}
 
 	@Override
@@ -506,7 +506,7 @@ public class SimpleForeignKeyDescriptor implements ForeignKeyDescriptor, BasicVa
 			int offset,
 			JdbcValuesConsumer valuesConsumer,
 			SharedSessionContractImplementor session) {
-		valuesConsumer.consume( offset, value, targetSide.getModelPart().getJdbcMapping() );
+		valuesConsumer.consume( offset, disassemble( value, session ), targetSide.getModelPart().getJdbcMapping() );
 		return getJdbcTypeCount();
 	}