diff --git a/src/V3Ast.h b/src/V3Ast.h
index 3f73c762a..8f0aee3a7 100644
--- a/src/V3Ast.h
+++ b/src/V3Ast.h
@@ -1551,6 +1551,9 @@ public:
 	MemberNameMap::const_iterator it = m_members.find(name);
 	return (it==m_members.end()) ? NULL : it->second;
     }
+    int lsb() const { return 0; }
+    int msb() const { return dtypep()->width()-1; }  // Packed classes look like arrays
+    int msbMaxSelect() const { return msb(); }
 };
 
 struct AstNodeArrayDType : public AstNodeDType {
@@ -1563,6 +1566,8 @@ private:
 public:
     AstNodeArrayDType(FileLine* fl) : AstNodeDType(fl) {}
     ASTNODE_BASE_FUNCS(NodeArrayDType)
+    virtual void dump(ostream& str);
+    virtual void dumpSmall(ostream& str);
     virtual bool broken() const { return !((m_refDTypep && !childDTypep() && m_refDTypep->brokeExists())
 					   || (!m_refDTypep && childDTypep())); }
     virtual void cloneRelink() { if (m_refDTypep && m_refDTypep->clonep()) {
diff --git a/src/V3AstNodes.cpp b/src/V3AstNodes.cpp
index 145efe847..9ce88ef74 100644
--- a/src/V3AstNodes.cpp
+++ b/src/V3AstNodes.cpp
@@ -748,6 +748,14 @@ void AstNodeDType::dumpSmall(ostream& str) {
     if (!widthSized()) str<<"/"<<widthMin();
     str<<")";
 }
+void AstNodeArrayDType::dumpSmall(ostream& str) {
+    this->AstNodeDType::dumpSmall(str);
+    str<<"["<<msb()<<":"<<lsb()<<"]";
+}
+void AstNodeArrayDType::dump(ostream& str) {
+    this->AstNodeDType::dump(str);
+    str<<" ["<<msb()<<":"<<lsb()<<"]";
+}
 void AstNodeModule::dump(ostream& str) {
     this->AstNode::dump(str);
     str<<"  L"<<level();