diff --git a/include/VersionedMap.h b/include/VersionedMap.h
index 0175984..bd4d236 100644
--- a/include/VersionedMap.h
+++ b/include/VersionedMap.h
@@ -101,8 +101,10 @@ struct __attribute__((__visibility__("default"))) VersionedMap {
     ~Iterator();
     Iterator(const Iterator &);
     Iterator &operator=(const Iterator &);
+#if __cplusplus > 199711L
     Iterator(Iterator &&) noexcept;
     Iterator &operator=(Iterator &&) noexcept;
+#endif
 
     struct VersionedMutation {
       /** param1 is guaranteed to have an addressable null byte at