1 files changed, 4 insertions, 0 deletions
diff --git a/src/post.h b/src/post.h
index c2f77b32..d04be266 100644
--- a/src/post.h
+++ b/src/post.h
@@ -205,7 +205,11 @@ public:
   mutable optional<xdata_t> xdata_;
 
   bool has_xdata() const {
+#if BOOST_VERSION >= 105600
+    return xdata_ != NULL;
+#else
     return xdata_;
+#endif
   }
   void clear_xdata() {
     xdata_ = none;