diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
index 7bb7b366402..ecb1fff49e8 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
@@ -2615,5 +2615,41 @@ public class AST2CPPTests extends AST2BaseTest {
         assertInstances( col, g1, 1 );
         assertInstances( col, g2, 2 );
     }
+    
+    public void testBug86649() throws Exception {
+        StringBuffer buffer = new StringBuffer();
+        buffer.append("class V { int f(); int x; };                 \n"); //$NON-NLS-1$
+        buffer.append("class W { int g(); int y; };                 \n"); //$NON-NLS-1$
+        buffer.append("class B : public virtual V, public W {       \n"); //$NON-NLS-1$
+        buffer.append("   int f();  int x;                          \n"); //$NON-NLS-1$
+        buffer.append("   int g();  int y;                          \n"); //$NON-NLS-1$
+        buffer.append("};                                           \n"); //$NON-NLS-1$
+        buffer.append("class C : public virtual V, public W {};     \n"); //$NON-NLS-1$
+        buffer.append("class D : public B, public C {               \n"); //$NON-NLS-1$
+        buffer.append("   void foo();                               \n"); //$NON-NLS-1$
+        buffer.append("};                                           \n"); //$NON-NLS-1$
+        buffer.append("void D::foo(){                               \n"); //$NON-NLS-1$
+        buffer.append("   x++;                                      \n"); //$NON-NLS-1$
+        buffer.append("   f();                                      \n"); //$NON-NLS-1$
+        buffer.append("   y++;                                      \n"); //$NON-NLS-1$
+        buffer.append("   g();                                      \n"); //$NON-NLS-1$
+        buffer.append("}                                            \n"); //$NON-NLS-1$
+        
+        IASTTranslationUnit tu = parse(buffer.toString(), ParserLanguage.CPP);
+        CPPNameCollector col = new CPPNameCollector();
+        tu.getVisitor().visitTranslationUnit(col);
+        
+        ICPPField x = (ICPPField) col.getName(23).resolveBinding();
+        ICPPMethod f = (ICPPMethod) col.getName(24).resolveBinding();
+        
+        IProblemBinding y = (IProblemBinding) col.getName(25).resolveBinding();
+        IProblemBinding g = (IProblemBinding) col.getName(26).resolveBinding();
+        
+        assertEquals( y.getID(), IProblemBinding.SEMANTIC_AMBIGUOUS_LOOKUP );
+        assertEquals( g.getID(), IProblemBinding.SEMANTIC_AMBIGUOUS_LOOKUP );
+        
+        assertInstances( col, x, 2 );
+        assertInstances( col, f, 2 );
+    }
 }
 
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
index d93b1fc0b06..0986c3ba67e 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
@@ -746,6 +746,8 @@ public class CPPSemantics {
 					
 					if( inherited == null || inherited.length == 0 ){
 						inherited = lookupInParents( data, parent );
+					} else {
+					    visitVirtualBaseClasses( data, cls );
 					}
 				} else {
 				    data.problem = new ProblemBinding( IProblemBinding.SEMANTIC_CIRCULAR_INHERITANCE, bases[i].getName().toCharArray() );
@@ -775,6 +777,26 @@ public class CPPSemantics {
 		return result;	
 	}
 
+	public static void visitVirtualBaseClasses( LookupData data, ICPPClassType cls ){
+	    ICPPBase [] bases = null;
+	    try {
+            bases = cls.getBases();
+        } catch ( DOMException e ) {
+            return;
+        }
+        for( int i = 0; i < bases.length; i++ ){
+            try {
+                if( bases[i].isVirtual() ){
+                    if( data.visited == ObjectSet.EMPTY_SET )
+				        data.visited = new ObjectSet(2);
+					data.visited.put( bases[i].getBaseClass().getCompositeScope() );
+                } else {
+                    visitVirtualBaseClasses( data, bases[i].getBaseClass() );
+                }
+            } catch ( DOMException e1 ) {
+            }
+        }
+	}
 	private static boolean checkAmbiguity( IASTName n, IASTName []names ) throws DOMException{
 	    names = (IASTName[]) ArrayUtil.trim( IASTName.class, names );
 	    if( names.length == 0 )