diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 5898ec3..33736c0 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -2936,9 +2936,13 @@ void fixupMaxVersion(Node *node, WriteContext *writeContext) {
     break;
   case Type_Node3: {
     auto *self3 = static_cast<Node3 *>(node);
-    max = std::max(max,
-                   horizontalMaxUpTo16(self3->childMaxVersion,
-                                       writeContext->zero, self3->numChildren));
+    assume(1 <= self3->numChildren);
+    assume(self3->numChildren <= 3);
+    InternalVersionT m = self3->childMaxVersion[0];
+    for (int i = 1; i < self3->numChildren; ++i) {
+      m = std::max(m, self3->childMaxVersion[i]);
+    }
+    max = std::max(max, m);
   } break;
   case Type_Node16: {
     auto *self16 = static_cast<Node16 *>(node);