diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/INamespace.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/INamespace.java
index e43b046cedd..ba8a5d6652f 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/INamespace.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/INamespace.java
@@ -7,7 +7,7 @@ package org.eclipse.cdt.core.model;
 /**
  * Represents a package declaration in a C translation unit.
  */
-public interface INamespace extends ICElement, ISourceManipulation, ISourceReference {
+public interface INamespace extends ICElement, IParent, ISourceManipulation, ISourceReference {
 	/**
 	 * Returns the name of the package the statement refers to.
 	 * This is a handle-only method.
diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/IStructure.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/IStructure.java
index 9fd93bf4306..b0b5742d97f 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/IStructure.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/IStructure.java
@@ -8,7 +8,7 @@ package org.eclipse.cdt.core.model;
 /**
  * Represent struct(ure), class or union.
  */
-public interface IStructure extends IInheritance, IParent, IDeclaration {
+public interface IStructure extends IInheritance, IParent, IVariableDeclaration {
 	//public String instantiatesTemplate();
 
 	public IField getField(String name);