diff --git a/ext/win32ole/win32ole.c b/ext/win32ole/win32ole.c
index 5015dde27d..9d0b1b0431 100644
--- a/ext/win32ole/win32ole.c
+++ b/ext/win32ole/win32ole.c
@@ -3996,11 +3996,11 @@ Init_win32ole(void)
     message_filter.RetryRejectedCall = mf_RetryRejectedCall;
     message_filter.MessagePending = mf_MessagePending;
 
-    enc2cp_hash = TypedData_Wrap_Struct(rb_cData, &win32ole_hash_datatype, 0);
+    enc2cp_hash = TypedData_Wrap_Struct(0, &win32ole_hash_datatype, 0);
     RTYPEDDATA_DATA(enc2cp_hash) = st_init_numtable();
     rb_gc_register_mark_object(enc2cp_hash);
 
-    com_hash = TypedData_Wrap_Struct(rb_cData, &win32ole_hash_datatype, 0);
+    com_hash = TypedData_Wrap_Struct(0, &win32ole_hash_datatype, 0);
     RTYPEDDATA_DATA(com_hash) = st_init_numtable();
     rb_gc_register_mark_object(com_hash);
 
diff --git a/marshal.c b/marshal.c
index 61eb01e721..dbf8dd461b 100644
--- a/marshal.c
+++ b/marshal.c
@@ -2240,7 +2240,7 @@ compat_allocator_table(void)
 #undef RUBY_UNTYPED_DATA_WARNING
 #define RUBY_UNTYPED_DATA_WARNING 0
     compat_allocator_tbl_wrapper =
-	Data_Wrap_Struct(rb_cData, mark_marshal_compat_t, 0, compat_allocator_tbl);
+	Data_Wrap_Struct(0, mark_marshal_compat_t, 0, compat_allocator_tbl);
     rb_gc_register_mark_object(compat_allocator_tbl_wrapper);
     return compat_allocator_tbl;
 }
diff --git a/process.c b/process.c
index da7556b858..7662387eca 100644
--- a/process.c
+++ b/process.c
@@ -2237,8 +2237,7 @@ rb_execarg_new(int argc, const VALUE *argv, int accept_shell)
 {
     VALUE execarg_obj;
     struct rb_execarg *eargp;
-    execarg_obj = TypedData_Make_Struct(rb_cData, struct rb_execarg, &exec_arg_data_type, eargp);
-    hide_obj(execarg_obj);
+    execarg_obj = TypedData_Make_Struct(0, struct rb_execarg, &exec_arg_data_type, eargp);
     rb_execarg_init(argc, argv, accept_shell, execarg_obj);
     return execarg_obj;
 }