size_bit_vector (const void *lheader)
{
Lisp_Bit_Vector *v = (Lisp_Bit_Vector *) lheader;
- return FLEXIBLE_ARRAY_STRUCT_SIZEOF (Lisp_Bit_Vector, bits,
+ return FLEXIBLE_ARRAY_STRUCT_SIZEOF (Lisp_Bit_Vector, unsigned long, bits,
BIT_VECTOR_LONG_STORAGE (bit_vector_length (v)));
}