1 files changed, 4 insertions, 1 deletions
diff --git a/py/objnamedtuple.h b/py/objnamedtuple.h
index d32af35af..9f23351d5 100644
--- a/py/objnamedtuple.h
+++ b/py/objnamedtuple.h
@@ -29,7 +29,10 @@
 #include "py/objtuple.h"
 
 typedef struct _mp_obj_namedtuple_type_t {
-    mp_obj_type_t base;
+    // Must use the full-size version to avoid this being a variable sized member.
+    // This means that named tuples use slightly more RAM than necessary, but
+    // no worse than if we didn't have slots/split representation.
+    mp_obj_full_type_t base;
     size_t n_fields;
     qstr fields[];
 } mp_obj_namedtuple_type_t;