diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
index 30fda240df4..a9404b9f3c7 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
@@ -2542,6 +2542,25 @@ public class AST2TemplateTests extends AST2BaseTest {
 		ICPPFunction fn= bh.assertNonProblem("foo(cx", 3, ICPPFunction.class);
 	}
 	
+	//	class A;
+	//
+	//	int foo(A a);
+	//
+	//	template <class T>
+	//	class C {
+	//	public:
+	//		inline operator A();
+	//	};
+	//
+	//	template<typename T>
+	//	void ref(C<T> c) {
+	//	 return foo(c);
+	//	}
+	public void testUserDefinedConversions_239023() throws Exception {
+		BindingAssertionHelper ba= new BindingAssertionHelper(getAboveComment(), true);
+		ba.assertNonProblem("foo(c);", 3);
+	}
+	
 	//	template<int x>
 	//	class A {};
 	//
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/SemanticUtil.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/SemanticUtil.java
index ba141327639..70a6c2e7382 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/SemanticUtil.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/SemanticUtil.java
@@ -34,6 +34,7 @@ import org.eclipse.cdt.core.parser.util.CharArrayUtils;
 import org.eclipse.cdt.core.parser.util.ObjectSet;
 import org.eclipse.cdt.internal.core.dom.parser.ITypeContainer;
 import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPFunctionType;
+import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPDeferredClassInstance;
 import org.eclipse.cdt.internal.core.dom.parser.cpp.OverloadableOperator;
 
 /**
@@ -63,6 +64,9 @@ public class SemanticUtil {
 	 */
 	public static final ICPPMethod[] getDeclaredConversionOperators(ICPPClassType clazz) throws DOMException {
 		ICPPMethod[] methods= new ICPPMethod[0];
+		if (clazz instanceof ICPPDeferredClassInstance) {
+			clazz= (ICPPClassType) ((ICPPDeferredClassInstance)clazz).getTemplateDefinition();
+		}
 		ICPPMethod[] decs= clazz.getDeclaredMethods();
 		if(decs != null) {
 			for(ICPPMethod method : decs) {