diff --git a/c/jv.c b/c/jv.c
index be50c6f6..53e2ef7d 100644
--- a/c/jv.c
+++ b/c/jv.c
@@ -768,6 +768,7 @@ jv jv_object_merge(jv a, jv b) {
                       jv_object_iter_key(b, i),
                       jv_object_iter_value(b, i));
   }
+  jv_free(b);
   return a;
 }