diff --git a/src/apps/debugger/model/Type.cpp b/src/apps/debugger/model/Type.cpp
index cf81243118..ebdd4e594e 100644
--- a/src/apps/debugger/model/Type.cpp
+++ b/src/apps/debugger/model/Type.cpp
@@ -104,6 +104,15 @@ Type::CreateDerivedAddressType(address_type_kind kind,
 }
 
 
+status_t
+Type::CreateDerivedArrayType(uint64 elementCount,
+	bool extendExisting, ArrayType*& _resultType)
+{
+	_resultType = NULL;
+	return B_ERROR;
+}
+
+
 // #pragma mark - PrimitiveType
 
 
diff --git a/src/apps/debugger/model/Type.h b/src/apps/debugger/model/Type.h
index 5c097da5e8..b3e018b0af 100644
--- a/src/apps/debugger/model/Type.h
+++ b/src/apps/debugger/model/Type.h
@@ -60,6 +60,7 @@ enum {
 
 class AddressType;
 class ArrayIndexPath;
+class ArrayType;
 class BString;
 class Type;
 class ValueLocation;
@@ -135,11 +136,21 @@ public:
 									// if requested)
 
 
-	// TODO: also need the ability to derive array types
 	virtual status_t			CreateDerivedAddressType(
 									address_type_kind kind,
 									AddressType*& _resultType);
 
+	virtual	status_t			CreateDerivedArrayType(
+									uint64 elementCount,
+									bool extendExisting,
+										// if the current object is already
+										// an array type, attach an extra
+										// dimension to it rather than
+										// creating a new encapsulating
+										// type object
+									ArrayType*& _resultType);
+
+
 	virtual	status_t			ResolveObjectDataLocation(
 									const ValueLocation& objectLocation,
 									ValueLocation*& _location) = 0;