diff --git a/apps/ex9.subx b/apps/ex9.subx
index 327ac655..232178a0 100644
--- a/apps/ex9.subx
+++ b/apps/ex9.subx
@@ -40,10 +40,10 @@ Entry:
 
 ascii-difference:  # (s1, s2): null-terminated ascii strings
     # a = first letter of s1 (ecx)
-    8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/esp  4/index/none              0/r32/eax   4/disp8         .                 # copy *(esp+4) to eax
+    8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/esp  4/index/none  .           0/r32/eax   4/disp8         .                 # copy *(esp+4) to eax
     8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           0/r32/eax   .               .                 # copy *eax to eax
     # b = first letter of s2 (edx)
-    8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/esp  4/index/none              1/r32/ecx   8/disp8                           # copy *(esp+8) to ecx
+    8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/esp  4/index/none  .           1/r32/ecx   8/disp8                           # copy *(esp+8) to ecx
     8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           1/r32/ecx   .               .                 # copy *ecx to ecx
     # a-b
     29/subtract                     3/mod/direct    0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # subtract ecx from eax