diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/TranslationUnit.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/TranslationUnit.java
index ee7ca550bce..95f5a2e00c6 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/TranslationUnit.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/TranslationUnit.java
@@ -380,10 +380,6 @@ public class TranslationUnit extends Openable implements ITranslationUnit {
 		return (WorkingCopy) perFactoryWorkingCopies.get(this);
 	}
 
-	public synchronized boolean isOpen() {
-		return super.isOpen();
-	}
-
 	public synchronized CElementInfo getElementInfo(IProgressMonitor monitor) throws CModelException {
 		return super.getElementInfo(monitor);
 	}