diff --git a/App/lib/Stub/StubGen/VpiReader.vp b/App/lib/Stub/StubGen/VpiReader.vp
index bce892e..8210b49 100644
--- a/App/lib/Stub/StubGen/VpiReader.vp
+++ b/App/lib/Stub/StubGen/VpiReader.vp
@@ -184,7 +184,7 @@ def _vpi_rebuild_ret_idx(new_cap: int) -> int:
     ri: int
     for ri in range(_g_vpi_ret_count):
         if _vpi_idx_insert(new_idx, new_cap, ri,
-                           _g_vpi_ret_keys + ri * VPI_RET_KEY_LEN) != 0:
+                           _g_vpi_ret_keys + ri * VPI_KEY_LEN) != 0:
             fail = 1
             break
     if fail != 0: