diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/formatter/CodeFormatterVisitor.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/formatter/CodeFormatterVisitor.java
index cd502b3f7ef..2129e9d44f1 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/formatter/CodeFormatterVisitor.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/formatter/CodeFormatterVisitor.java
@@ -3556,7 +3556,8 @@ public class CodeFormatterVisitor extends ASTVisitor implements ICPPASTVisitor,
 		}
 		for (ICPPASTNameSpecifier nameSpec : node.getQualifier()) {
 			nameSpec.accept(this);
-			scribe.printNextToken(Token.tCOLONCOLON);
+			if (peekNextToken() == Token.tCOLONCOLON)
+				scribe.printNextToken(Token.tCOLONCOLON);
 		}
 		if (peekNextToken() == Token.tCOMPL) {
 			// destructor
diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CodeFormatterTest.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CodeFormatterTest.java
index ec166d5bfa2..8f133335978 100644
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CodeFormatterTest.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/CodeFormatterTest.java
@@ -3781,4 +3781,34 @@ public class CodeFormatterTest extends BaseUITestCase {
 	public void testTemplateInstantiationOperatorLesser_Bug540252() throws Exception {
 		assertFormatterResult();
 	}
+
+	//#define WW(x) std::ostringstream(x)
+	//namespace some_namespace
+	//{
+	//	void func()
+	//	{
+	//		try
+	//		{
+	//			WW("1") << "2";
+	//		}
+	//		catch (const std::exception& e)
+	//		{
+	//			std::cout << "blah...." << std::endl;
+	//		}
+	//	}
+	//}
+
+	//#define WW(x) std::ostringstream(x)
+	//namespace some_namespace {
+	//void func() {
+	//	try {
+	//		WW("1") << "2";
+	//	} catch (const std::exception& e) {
+	//		std::cout << "blah...." << std::endl;
+	//	}
+	//}
+	//}
+	public void testFormmatterWithMacro_Bug543947() throws Exception {
+		assertFormatterResult();
+	}
 }