1 files changed, 2 insertions, 2 deletions

diff --git a/src/lj_err.c b/src/lj_err.c
index 20be9e9a..02a7c4cc 100644
--- a/src/lj_err.c
+++ b/src/lj_err.c
@@ -107,10 +107,10 @@ restart:
         if (ra == slot) { slot = bc_d(ins); goto restart; }
         break;
       case BC_GGET:
-        *name = strdata(gco2str(gcref(pt->k.gc[~bc_d(ins)])));
+        *name = strdata(gco2str(gcref(pt->k.gc[~(ptrdiff_t)bc_d(ins)])));
         return "global";
       case BC_TGETS:
-        *name = strdata(gco2str(gcref(pt->k.gc[~bc_c(ins)])));
+        *name = strdata(gco2str(gcref(pt->k.gc[~(ptrdiff_t)bc_c(ins)])));
         if (ip > pt->bc) {
           BCIns insp = ip[-1];
           if (bc_op(insp) == BC_MOV && bc_a(insp) == ra+1 &&