extern "C" used in skeletons

diff --git a/skeletons/NativeEnumerated.h b/skeletons/NativeEnumerated.h
index 16f1bfd..7e2bb1b 100644
--- a/skeletons/NativeEnumerated.h
+++ b/skeletons/NativeEnumerated.h
@@ -14,8 +14,16 @@
 
 #include <NativeInteger.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern asn_TYPE_descriptor_t asn_DEF_NativeEnumerated;
 
 xer_type_encoder_f NativeEnumerated_encode_xer;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif	/* _NativeEnumerated_H_ */