diff --git a/include/util/trbtree.h b/include/util/trbtree.h
index 50e2663648..f6d37e3d75 100644
--- a/include/util/trbtree.h
+++ b/include/util/trbtree.h
@@ -51,9 +51,10 @@ struct SRBTreeNode {
   SRBTreeNode *parent;
   SRBTreeNode *left;
   SRBTreeNode *right;
-  uint8_t      payload[0];
 };
 
+#define RBTREE_NODE_PAYLOAD(N) ((const void *)&(N)[1])
+
 struct SRBTree {
   tRBTreeCmprFn cmprFn;
   int64_t       n;