1 files changed, 5 insertions, 1 deletions
diff --git a/py/bc.c b/py/bc.c
index b98df39e2..2a21ffd4b 100644
--- a/py/bc.c
+++ b/py/bc.c
@@ -335,7 +335,11 @@ uint mp_opcode_format(const byte *ip, size_t *opcode_size, bool count_var_uint)
                 }
             }
         } else if (f == MP_BC_FORMAT_OFFSET) {
-            ip += 2;
+            if ((*ip & 0x80) == 0) {
+                ip += 1;
+            } else {
+                ip += 2;
+            }
         }
         ip += extra_byte;
     }