diff --git a/bintree.c b/bintree.c
index b9b5e54..4cecb66 100644
--- a/bintree.c
+++ b/bintree.c
@@ -30,7 +30,7 @@ TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFc
         {
             return NULL;
         }
-        insertedNode->data = memcpy(insertedNode->data, data, dataSize);
+        memcpy(insertedNode->data, data, dataSize);
         // reset isDuplicate if it exists
         if (isDuplicate)
         {