diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/internal/pdom/tests/NamespaceTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/internal/pdom/tests/NamespaceTests.java
index 70a6cc6ecb5..43062a9da00 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/internal/pdom/tests/NamespaceTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/internal/pdom/tests/NamespaceTests.java
@@ -209,6 +209,6 @@ public class NamespaceTests extends PDOMTestBase {
 		assertEquals(0, decls.length);
 
 		IName[] refs = pdom.findNames(variable1, IIndex.FIND_REFERENCES);
-		assertEquals(2, refs.length);
+		assertEquals(3, refs.length);
 	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/PDOMName.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/PDOMName.java
index 6b167bfa2da..157266fcb71 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/PDOMName.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/PDOMName.java
@@ -18,6 +18,8 @@ import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
 import org.eclipse.cdt.core.dom.ast.IASTName;
 import org.eclipse.cdt.core.dom.ast.IASTPreprocessorIncludeStatement;
+import org.eclipse.cdt.core.dom.ast.IBinding;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPUsingDeclaration;
 import org.eclipse.cdt.core.index.IIndexFile;
 import org.eclipse.cdt.core.index.IIndexName;
 import org.eclipse.cdt.core.index.IndexLocationFactory;
@@ -77,6 +79,17 @@ public final class PDOMName implements IIndexFragmentName, IASTFileLocation {
 			break;
 		case IS_DECLARATION:
 			binding.addDeclaration(this);
+			
+			// The name of a using-declaration is, in addition to the declaration of
+			// the using-declaration binding, a reference to its delegate bindings.
+			if (binding instanceof ICPPUsingDeclaration) {
+				for (IBinding delegate : ((ICPPUsingDeclaration) binding).getDelegates()) {
+					if (delegate instanceof PDOMBinding) {
+						((PDOMBinding) delegate).addReference(this);
+					}
+				}
+			}
+			
 			break;
 		case IS_REFERENCE:
 			binding.addReference(this);
diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/search/FindReferencesTest.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/search/FindReferencesTest.java
index 491f2c043b6..6844efb2a7b 100644
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/search/FindReferencesTest.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/search/FindReferencesTest.java
@@ -95,4 +95,16 @@ public class FindReferencesTest extends SearchTestBase {
 		assertEquals(1, matches.length);
 		assertNotNull(matches[0].getEnclosingElement());
 	}
+	
+	//	namespace N {
+	//		void foo();
+	//	}
+	//	using N::foo;
+	
+	//	// empty file
+	public void testUsingDeclaration_399147() throws Exception {
+		int offset = fHeaderContents.indexOf("void foo") + 5;
+		CSearchQuery query = makeProjectQuery(offset, 3);
+		assertOccurrences(query, 1);
+	}
 }