diff --git a/core/src/main/kotlin/net/corda/core/serialization/carpenter/ClassCarpenter.kt b/core/src/main/kotlin/net/corda/core/serialization/carpenter/ClassCarpenter.kt
index 2544727a9c..5d774df240 100644
--- a/core/src/main/kotlin/net/corda/core/serialization/carpenter/ClassCarpenter.kt
+++ b/core/src/main/kotlin/net/corda/core/serialization/carpenter/ClassCarpenter.kt
@@ -90,7 +90,6 @@ class ClassCarpenter {
             get() = if (this.field.isPrimitive) this.descriptor else "Ljava/lang/Object;"
 
         fun generateField(cw: ClassWriter) {
-            println ("generateField $name $nullabilityAnnotation")
             val fieldVisitor = cw.visitField(ACC_PROTECTED + ACC_FINAL, name, descriptor, null, null)
             fieldVisitor.visitAnnotation(nullabilityAnnotation, true).visitEnd()
             fieldVisitor.visitEnd()