diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 02b2202..87b0498 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -1729,7 +1729,8 @@ template <bool kBegin>
         auto *old = *self;
         int64_t oldMaxVersion = maxVersion(old, impl);
 
-        *self = allocators->node0.allocate(partialKeyIndex);
+        // *self will have one child
+        *self = allocators->node4.allocate(partialKeyIndex);
 
         memcpy((char *)*self + kNodeCopyBegin, (char *)old + kNodeCopyBegin,
                kNodeCopySize);