diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/c/CASTTranslationUnit.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/c/CASTTranslationUnit.java
index 743c942ee2d..c8319e3dfe7 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/c/CASTTranslationUnit.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/c/CASTTranslationUnit.java
@@ -32,7 +32,7 @@ import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;
  */
 public class CASTTranslationUnit extends ASTTranslationUnit implements IASTAmbiguityParent {
 	private CScope compilationUnit = null;
-	private CStructMapper fStructMapper;
+	private final CStructMapper fStructMapper;
 
 	public CASTTranslationUnit() {
 		fStructMapper= new CStructMapper(this);
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTTranslationUnit.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTTranslationUnit.java
index 7bde5f7f289..2586b1f0f50 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTTranslationUnit.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTTranslationUnit.java
@@ -40,7 +40,7 @@ import org.eclipse.cdt.internal.core.parser.scanner.InternalFileContent;
 public class CPPASTTranslationUnit extends ASTTranslationUnit implements ICPPASTTranslationUnit, IASTAmbiguityParent {
     private CPPNamespaceScope fScope = null;
     private ICPPNamespace fBinding = null;
-	private CPPScopeMapper fScopeMapper= new CPPScopeMapper(this);
+	private final CPPScopeMapper fScopeMapper= new CPPScopeMapper(this);
 	
 	public CPPASTTranslationUnit() {
 	}