diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/BasicCompletionTest.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/BasicCompletionTest.java
index dcb7164927e..4938dd819bf 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/BasicCompletionTest.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/BasicCompletionTest.java
@@ -275,4 +275,15 @@ public class BasicCompletionTest extends CompletionTestBase {
 		String[] expected= {};
 		checkCompletion(code, false, expected);
 	}
+	
+	//	struct A {
+	//		A(int, char, int){}
+	//	};
+	//	struct B :  A {
+	//		B() : A
+	public void testCompletionInCtorOfMemberInitializer_327064() throws Exception {
+		String code = getAboveComment();
+		String[] expected= {"A"};
+		checkNonPrefixCompletion(code, true, expected);
+	}
 }
diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/CompletionTestBase.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/CompletionTestBase.java
index f6fc2a3194d..183f4e15b51 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/CompletionTestBase.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/prefix/CompletionTestBase.java
@@ -94,9 +94,17 @@ public class CompletionTestBase extends BaseTestCase {
 	}
 	
 	protected void checkCompletion(String code, boolean isCpp, String[] expected) throws ParserException {
-		IASTCompletionNode node = isCpp ? getGPPCompletionNode(code) : getGCCCompletionNode(code);
+		checkCompletion(code, true, isCpp, expected);
+	}
+
+	protected void checkNonPrefixCompletion(String code, boolean isCpp, String[] expected) throws ParserException {
+		checkCompletion(code, false, isCpp, expected);
+	}
+
+	private void checkCompletion(String code, boolean isPrefix, boolean isCpp, String[] expected) throws ParserException {
+				IASTCompletionNode node = isCpp ? getGPPCompletionNode(code) : getGCCCompletionNode(code);
 		assertNotNull(node);
-		List<IBinding> bindings= proposeBindings(node);
+		List<IBinding> bindings= proposeBindings(node, isPrefix);
 		String[] names= getSortedNames(bindings);
 		int len= Math.min(expected.length, names.length);
 		for (int i = 0; i < len; i++) {
@@ -131,7 +139,7 @@ public class CompletionTestBase extends BaseTestCase {
 		return TestSourceReader.getContentsForTest(plugin.getBundle(), "parser", getClass(), getName(), sections);
 	}
 	
-	protected List<IBinding> proposeBindings(IASTCompletionNode completionNode) {
+	protected List<IBinding> proposeBindings(IASTCompletionNode completionNode, boolean isPrefix) {
 		List<IBinding> proposals = new ArrayList<IBinding>();
 		boolean handleMacros= false;
 		IASTName[] names = completionNode.getNames();
@@ -145,7 +153,7 @@ public class CompletionTestBase extends BaseTestCase {
 			if (astContext == null) {
 				continue;
 			} 
-			IBinding[] bindings = astContext.findBindings(names[i], true);
+			IBinding[] bindings = astContext.findBindings(names[i], isPrefix);
 			if (bindings != null)
 				for (int j = 0; j < bindings.length; ++j)
 					proposals.add(bindings[j]);
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTConstructorChainInitializer.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTConstructorChainInitializer.java
index 10f652a8b32..379a0013a63 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTConstructorChainInitializer.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPASTConstructorChainInitializer.java
@@ -12,8 +12,6 @@
  *******************************************************************************/
 package org.eclipse.cdt.internal.core.dom.parser.cpp;
 
-import java.util.Arrays;
-
 import org.eclipse.cdt.core.dom.ast.ASTVisitor;
 import org.eclipse.cdt.core.dom.ast.IASTExpression;
 import org.eclipse.cdt.core.dom.ast.IASTImplicitName;
@@ -24,14 +22,16 @@ import org.eclipse.cdt.core.dom.ast.IASTNode;
 import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.core.dom.ast.ICPPASTCompletionContext;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier.ICPPASTBaseSpecifier;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTConstructorChainInitializer;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTConstructorInitializer;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTQualifiedName;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPConstructor;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPField;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPNamespace;
-import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier.ICPPASTBaseSpecifier;
 import org.eclipse.cdt.core.parser.util.ArrayUtil;
+import org.eclipse.cdt.core.parser.util.CharArraySet;
 import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
 import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPSemantics;
 
@@ -131,28 +131,16 @@ public class CPPASTConstructorChainInitializer extends ASTNode implements
 	public IBinding[] findBindings(IASTName n, boolean isPrefix, String[] namespaces) {
 		IBinding[] bindings = CPPSemantics.findBindingsForContentAssist(n, isPrefix, namespaces);
 
-		ICPPASTBaseSpecifier[] baseClasses = null;
-
+		CharArraySet baseClasses = null;
 		for (int i = 0; i < bindings.length; i++) {
-			if ((bindings[i] instanceof ICPPField) || (bindings[i] instanceof ICPPNamespace)) {
-				continue;
-			} else if (bindings[i] instanceof ICPPConstructor) {
-				if (baseClasses == null) {
+			final IBinding b = bindings[i];
+			if ((b instanceof ICPPField) || (b instanceof ICPPNamespace)) {
+				// OK, keep binding.
+			} else if (b instanceof ICPPConstructor || b instanceof ICPPClassType) {
+				if (baseClasses == null) 
 					baseClasses = getBaseClasses(n);
-				}
-				boolean isBaseClassConstructor = false;
-				if (baseClasses != null) {
-					for (ICPPASTBaseSpecifier b : baseClasses) {
-						char[] bindingName = bindings[i].getNameCharArray();
-						char[] baseName = b.getName().getLastName().getSimpleID();
-						if (Arrays.equals(bindingName, baseName)) {
-							isBaseClassConstructor = true;
-							break;
-						}
-					}
-				}
-
-				if (!isBaseClassConstructor) {
+				
+				if (!baseClasses.containsKey(b.getNameCharArray())) {
 					bindings[i] = null;
 				}
 			} else {
@@ -162,14 +150,17 @@ public class CPPASTConstructorChainInitializer extends ASTNode implements
 		return (IBinding[]) ArrayUtil.removeNulls(IBinding.class, bindings);
 	}
 
-	private ICPPASTBaseSpecifier[] getBaseClasses(IASTName name) {
+	private CharArraySet getBaseClasses(IASTName name) {
+		CharArraySet result= new CharArraySet(2);
 		for (IASTNode parent = name.getParent(); parent != null; parent = parent.getParent()) {
 			if (parent instanceof ICPPASTCompositeTypeSpecifier) {
 				ICPPASTCompositeTypeSpecifier specifier = (ICPPASTCompositeTypeSpecifier) parent;
-				return specifier.getBaseSpecifiers();
+				for (ICPPASTBaseSpecifier bs : specifier.getBaseSpecifiers()) {
+					result.put(bs.getName().getLastName().getSimpleID());
+				} 
 			}
 		}
-		return null;
+		return result;
 	}
 
 	public boolean isPackExpansion() {