1 files changed, 2 insertions, 1 deletions
diff --git a/Include/internal/pycore_interp_structs.h b/Include/internal/pycore_interp_structs.h
index f25f5847b3b..f1f427d99de 100644
--- a/Include/internal/pycore_interp_structs.h
+++ b/Include/internal/pycore_interp_structs.h
@@ -159,10 +159,11 @@ struct atexit_state {
 typedef struct {
     // Tagged pointer to next object in the list.
     // 0 means the object is not tracked
-    uintptr_t _gc_next;
+    _Py_ALIGNED_DEF(_PyObject_MIN_ALIGNMENT, uintptr_t) _gc_next;
 
     // Tagged pointer to previous object in the list.
     // Lowest two bits are used for flags documented later.
+    // Those bits are made available by the struct's minimum alignment.
     uintptr_t _gc_prev;
 } PyGC_Head;