diff --git a/src/serialization/impl/extern_c_opr.cpp b/src/serialization/impl/extern_c_opr.cpp
index 1dcc8b8cf68a97bb40e941172398417bbc106909..080b023eb27d19df5f560b9dc3a3e94f556bd23a 100644
--- a/src/serialization/impl/extern_c_opr.cpp
+++ b/src/serialization/impl/extern_c_opr.cpp
@@ -290,8 +290,11 @@ ExternCOprRunner::ExternCOprRunner(std::string& name,
           m_dump_name{name},
           m_param{nullptr} {
     mgb_assert(m_desc->size == sizeof(MGBOprDesc),
-               "invalid MGBOprDesc size: expect=%zu got=%u", sizeof(MGBOprDesc),
-               m_desc->size);
+               "invalid MGBOprDesc size: expect=%zu got=%u, may caused by "
+               "extern_c_opr.h mismatch, please confirm that the "
+               "extern_c_opr.h used when compiling the loader is consistent "
+               "with the runtime caller build used",
+               sizeof(MGBOprDesc), m_desc->size);
     for (auto i : inputs) {
         add_input({i});
     }