diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/implementmethod/ImplementMethodRefactoringTest.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/implementmethod/ImplementMethodRefactoringTest.java
index f48cb2f736c..4457674db91 100755
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/implementmethod/ImplementMethodRefactoringTest.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/refactoring/implementmethod/ImplementMethodRefactoringTest.java
@@ -864,4 +864,17 @@ public class ImplementMethodRefactoringTest extends RefactoringTestBase {
 		expectedFinalInfos = 1;
 		assertRefactoringSuccess();
 	}
+
+	//A.h
+	//
+	///*$*/int PrintfToStdStr(const char *pszFmt, ...);/*$$*/
+	//
+
+	//A.cpp
+	//====================
+	//int PrintfToStdStr(const char *pszFmt, ...) {
+	//}
+	public void testFreeFunctionWithVarArgs_Bug384793() throws Exception {
+		assertRefactoringSuccess();
+	}
 }
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/implementmethod/ImplementMethodRefactoring.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/implementmethod/ImplementMethodRefactoring.java
index 5d60ae6252c..844378ec79b 100755
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/implementmethod/ImplementMethodRefactoring.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/refactoring/implementmethod/ImplementMethodRefactoring.java
@@ -326,6 +326,7 @@ public class ImplementMethodRefactoring extends CRefactoring {
 		createdMethodDeclarator = nodeFactory.newFunctionDeclarator(qName);
 		createdMethodDeclarator.setConst(functionDeclarator.isConst());
 		createdMethodDeclarator.setRefQualifier(functionDeclarator.getRefQualifier());
+		createdMethodDeclarator.setVarArgs(functionDeclarator.takesVarArgs());
 		for (IASTPointerOperator pop : functionDeclarator.getPointerOperators()) {
 			createdMethodDeclarator.addPointerOperator(pop.copy(CopyStyle.withLocations));
 		}