diff --git a/include/pybind11/detail/internals.h b/include/pybind11/detail/internals.h
index 3f0a6a949..5202a1163 100644
--- a/include/pybind11/detail/internals.h
+++ b/include/pybind11/detail/internals.h
@@ -324,12 +324,12 @@ struct type_info {
 #define PYBIND11_INTERNALS_ID                                                                     \
     "__pybind11_internals_v" PYBIND11_TOSTRING(PYBIND11_INTERNALS_VERSION)                        \
         PYBIND11_INTERNALS_KIND PYBIND11_COMPILER_TYPE PYBIND11_STDLIB                            \
-            PYBIND11_BUILD_ABI PYBIND11_BUILD_TYPE "__"
+            PYBIND11_BUILD_ABI PYBIND11_BUILD_TYPE "_sh_baked_in__"
 
 #define PYBIND11_MODULE_LOCAL_ID                                                                  \
     "__pybind11_module_local_v" PYBIND11_TOSTRING(PYBIND11_INTERNALS_VERSION)                     \
         PYBIND11_INTERNALS_KIND PYBIND11_COMPILER_TYPE PYBIND11_STDLIB                            \
-            PYBIND11_BUILD_ABI PYBIND11_BUILD_TYPE "__"
+            PYBIND11_BUILD_ABI PYBIND11_BUILD_TYPE "_sh_baked_in__"
 
 /// Each module locally stores a pointer to the `internals` data. The data
 /// itself is shared among modules with the same `PYBIND11_INTERNALS_ID`.