1 files changed, 5 insertions, 1 deletions
diff --git a/src/post.h b/src/post.h
index 3fa67e56..0fb45e90 100644
--- a/src/post.h
+++ b/src/post.h
@@ -205,7 +205,11 @@ public:
   mutable optional<xdata_t> xdata_;
 
   bool has_xdata() const {
-    return xdata_ != boost::none;
+#if BOOST_VERSION >= 105600
+    return xdata_ != NULL;
+#else
+    return xdata_;
+#endif
   }
   void clear_xdata() {
     xdata_ = none;