Index: src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs
===================================================================
--- src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs	(revision 2499)
+++ src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs	(working copy)
@@ -2549,10 +2549,11 @@
 					return ResolveAmbiguousTypeReference(node, candidates);
 				}
 			}
-			return candidates;
+
+            return ResolveAmbiguousReferenceByAccessibility(candidates);
 		}
-		
-		private IEntity ResolveAmbiguousMethodReference(ReferenceExpression node, Ambiguous candidates, ExpressionCollection args)
+
+        private IEntity ResolveAmbiguousMethodReference(ReferenceExpression node, Ambiguous candidates, ExpressionCollection args)
 		{
 			//BOO-656
 			if (!AstUtil.IsTargetOfMethodInvocation(node)
@@ -2608,7 +2609,22 @@
 			return node.Entity;
 		}
 
-		private int GetIndex(IEntity[] entities, IEntity entity)
+		private IEntity ResolveAmbiguousReferenceByAccessibility(Ambiguous candidates)
+        {
+            List newEntities = new List();
+            foreach (IEntity entity in candidates.Entities)
+            {
+                if (!IsInaccessible(entity))
+                { newEntities.Add(entity); }
+            }
+
+            if (newEntities.Count == 1)
+            { return (IEntity)newEntities[0]; }
+
+            return new Ambiguous(newEntities);
+        }
+
+        private int GetIndex(IEntity[] entities, IEntity entity)
 		{
 			for (int i=0; i<entities.Length; ++i)
 			{
Index: tests/testcases/regression/BOO-724-1.boo
===================================================================
--- tests/testcases/regression/BOO-724-1.boo	(revision 0)
+++ tests/testcases/regression/BOO-724-1.boo	(revision 0)
@@ -0,0 +1,16 @@
+"""
+foo
+"""
+class Foo:
+    private _x as object
+
+class Bar(Foo):
+    private _x as string
+
+    def constructor():
+        _x = "foo"
+
+    def run():
+        print _x
+
+Bar().run()
Index: tests/testcases/regression/BOO-724-2.boo
===================================================================
--- tests/testcases/regression/BOO-724-2.boo	(revision 0)
+++ tests/testcases/regression/BOO-724-2.boo	(revision 0)
@@ -0,0 +1,21 @@
+"""
+w x y z
+"""
+class Foo:
+    protected _x as string
+    internal _y as string
+    public _z as string
+
+class Bar(Foo):
+    private _w as string
+
+    def constructor():
+        _w = "w"
+        _x = "x"
+        _y = "y"
+        _z = "z"
+
+    def run():
+        print _w, _x, _y, _z
+
+Bar().run()