1 files changed, 3 insertions, 1 deletions

diff --git a/src/lj_ir.h b/src/lj_ir.h
index 34c27853..8057a750 100644
--- a/src/lj_ir.h
+++ b/src/lj_ir.h
@@ -377,10 +377,12 @@ typedef struct IRType1 { uint8_t irt; } IRType1;
 #define irt_isint64(t)          (irt_typerange((t), IRT_I64, IRT_U64))
 
 #if LJ_GC64
+/* Include IRT_NIL, so IR(ASMREF_L) (aka REF_NIL) is considered 64 bit. */
 #define IRT_IS64 \
   ((1u<<IRT_NUM)|(1u<<IRT_I64)|(1u<<IRT_U64)|(1u<<IRT_P64)|\
    (1u<<IRT_LIGHTUD)|(1u<<IRT_STR)|(1u<<IRT_THREAD)|(1u<<IRT_PROTO)|\
-   (1u<<IRT_FUNC)|(1u<<IRT_CDATA)|(1u<<IRT_TAB)|(1u<<IRT_UDATA))
+   (1u<<IRT_FUNC)|(1u<<IRT_CDATA)|(1u<<IRT_TAB)|(1u<<IRT_UDATA)|\
+   (1u<<IRT_NIL))
 #elif LJ_64
 #define IRT_IS64 \
   ((1u<<IRT_NUM)|(1u<<IRT_I64)|(1u<<IRT_U64)|(1u<<IRT_P64)|(1u<<IRT_LIGHTUD))