diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
index 8806d9ca681..cafd6a20aa9 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
@@ -246,7 +246,7 @@ public class CPPSemantics {
 	/**
 	 * The maximum depth to search ancestors before assuming infinite looping.
 	 */
-	public static final int MAX_INHERITANCE_DEPTH= 16;
+	public static final int MAX_INHERITANCE_DEPTH= 40;
 
 	public static final String EMPTY_NAME = ""; //$NON-NLS-1$
 	public static final char[] OPERATOR_ = new char[] {'o','p','e','r','a','t','o','r',' '};