diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/togglefunction/ToggleRefactoringTest.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/togglefunction/ToggleRefactoringTest.java
index 4f6774f9617..d41289a42ef 100644
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/togglefunction/ToggleRefactoringTest.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/togglefunction/ToggleRefactoringTest.java
@@ -3627,4 +3627,25 @@ public class ToggleRefactoringTest extends RefactoringTestBase {
 	public void testToggleWithVirtSpecifiersImplementationToClass_518273() throws Exception {
 		assertRefactoringSuccess();
 	}
+
+	//Test.h
+	//class Foo {
+	//	void /*$*/foo/*$$*/() {
+	//		[]() {
+	//
+	//		};
+	//	}
+	//};
+	//====================
+	//class Foo {
+	//	void foo();
+	//};
+	//
+	//inline void Foo::foo() {
+	//	[]() {
+	//	};
+	//}
+	public void testToggleWithLambdaExpression_518271() throws Exception {
+		assertRefactoringSuccess();
+	}
 }
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/togglefunction/InsertionPointFinder.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/togglefunction/InsertionPointFinder.java
index f3396ef650e..5d45275ae10 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/togglefunction/InsertionPointFinder.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/togglefunction/InsertionPointFinder.java
@@ -48,6 +48,10 @@ public class InsertionPointFinder {
 		if (allafterdeclarations == null || alldefinitionsoutside == null)
 			return;
 		for(ICPPASTFunctionDeclarator decl: allafterdeclarations) {
+			if (decl.getName() == null) {
+				// Could be a lambda expression
+				continue;
+			}
 			String decl_name = decl.getName().toString();
 			for(ICPPASTFunctionDefinition def: alldefinitionsoutside) {
 				String def_name = null;