diff --git a/tests/libufdt_verify/ufdt_test_overlay.cpp b/tests/libufdt_verify/ufdt_test_overlay.cpp
index 71e888b..603228d 100644
--- a/tests/libufdt_verify/ufdt_test_overlay.cpp
+++ b/tests/libufdt_verify/ufdt_test_overlay.cpp
@@ -348,7 +348,7 @@
         if (ufdt_overlay_do_local_fixups(overlay_tree[i], phandle_offset) < 0) {
             return -1;
         }
-        phandle_offset = ufdt_get_max_phandle(overlay_tree[i]);
+        phandle_offset += ufdt_get_max_phandle(overlay_tree[i]);
   }
 
   return 0;