diff --git a/subx/056write.subx b/subx/056write.subx
index a8ac3fca..0f8bf0b1 100644
--- a/subx/056write.subx
+++ b/subx/056write.subx
@@ -51,7 +51,7 @@ write:  # f : fd or (address stream), s : (address array byte) -> bytes_written/
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
   # if (f < 0x08000000) _write(f, s), return  # f can't be a user-mode address, so treat it as a kernel file descriptor
   81          7/subop/compare     1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           8/disp8         0x08000000/imm32  # compare *(EBP+8)
-  7f/jump-if-greater  $write:fake/disp8
+  7d/jump-if-greater-or-equal  $write:fake/disp8
     # push args
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0xc/disp8       .                 # push *(EBP+12)
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           8/disp8         .                 # push *(EBP+8)
diff --git a/subx/apps/crenshaw2-1 b/subx/apps/crenshaw2-1
index 3324ed37..18a107ad 100755
Binary files a/subx/apps/crenshaw2-1 and b/subx/apps/crenshaw2-1 differ
diff --git a/subx/apps/factorial b/subx/apps/factorial
index feb07764..c5958765 100755
Binary files a/subx/apps/factorial and b/subx/apps/factorial differ