diff --git a/src/java/File.hxx b/src/java/File.hxx
index a805cdad5..e7a1a5363 100644
--- a/src/java/File.hxx
+++ b/src/java/File.hxx
@@ -45,6 +45,8 @@ class File : public LocalObject {
 	static jmethodID getAbsolutePath_method;
 
 public:
+	using LocalObject::LocalObject;
+
 	gcc_nonnull_all
 	static void Initialise(JNIEnv *env) noexcept;
 
diff --git a/src/java/String.hxx b/src/java/String.hxx
index 3e6e682a4..715cf647b 100644
--- a/src/java/String.hxx
+++ b/src/java/String.hxx
@@ -44,8 +44,7 @@ namespace Java {
  */
 class String : public LocalRef<jstring> {
 public:
-	String(JNIEnv *env, jstring value) noexcept
-		:LocalRef<jstring>(env, value) {}
+	using LocalRef::LocalRef;
 
 	String(JNIEnv *_env, const char *_value) noexcept
 		:LocalRef<jstring>(_env, _env->NewStringUTF(_value)) {}