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 6f11824f4ba..a9313365212 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
@@ -11751,4 +11751,17 @@ public class AST2CPPTests extends AST2TestBase {
 		assertEquals(1, implicitNames.length);
 		assertEquals(ctor, implicitNames[0].resolveBinding());
 	}
+	
+	//	template <typename T>
+	//	struct Waldo {
+	//	    T x;
+	//	};
+	//
+	//	void test() {
+	//	    using Waldo = Waldo<int>;
+	//	    auto size = sizeof(Waldo::x);
+	//	}
+	public void testShadowingAliasDeclaration_484200() throws Exception {
+		parseAndCheckBindings();
+	}
 }
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 55fe5f93a8c..5a14ad8c180 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
@@ -1967,6 +1967,11 @@ public class CPPSemantics {
             } else if (prop == ICPPASTNamespaceAlias.ALIAS_NAME) {
             	nd = (ASTNode) nd.getParent();
             	pointOfDecl = nd.getOffset() + nd.getLength();
+            } else if (prop == ICPPASTAliasDeclaration.ALIAS_NAME) {
+            	// [basic.scope.pdecl]/p3: The point of declaration of an alias or alias template
+            	// immediately follows the type-id to which the alias refers.
+            	ASTNode targetType = (ASTNode) ((ICPPASTAliasDeclaration) nd.getParent()).getMappingTypeId();
+            	pointOfDecl = targetType.getOffset() + targetType.getLength();
             } else if (prop == ICPPASTSimpleTypeTemplateParameter.PARAMETER_NAME
             		|| prop == ICPPASTTemplatedTypeTemplateParameter.PARAMETER_NAME) {
             	// [basic.scope.pdecl]/p9: The point of declaration for a template parameter