1 files changed, 12 insertions, 9 deletions

diff --git a/contrib/masmx86/inffas32.asm b/contrib/masmx86/inffas32.asm
index 7d76e1c..531bcef 100644
--- a/contrib/masmx86/inffas32.asm
+++ b/contrib/masmx86/inffas32.asm
@@ -84,17 +84,20 @@ dd	2147483647
 dd      4294967295
 
 
+; head was added in zlib 1.2.2.1, so we add addstr
+; set addstr to 0 with zlib 1.2.1 of below
+addstr           equ    4
 
 mode_state       equ    0       ;/* state->mode */
-wsize_state      equ    32      ;/* state->wsize */
-write_state      equ    (36+4)  ;/* state->write */
-window_state     equ    (40+4)  ;/* state->window */
-hold_state       equ    (44+4)  ;/* state->hold */
-bits_state       equ    (48+4)  ;/* state->bits */
-lencode_state    equ    (64+4)  ;/* state->lencode */
-distcode_state   equ    (68+4)  ;/* state->distcode */
-lenbits_state    equ    (72+4)  ;/* state->lenbits */
-distbits_state   equ    (76+4)  ;/* state->distbits */
+wsize_state      equ    32+addstr       ;/* state->wsize */
+write_state      equ    (36+4+addstr)   ;/* state->write */
+window_state     equ    (40+4+addstr)   ;/* state->window */
+hold_state       equ    (44+4+addstr)   ;/* state->hold */
+bits_state       equ    (48+4+addstr)   ;/* state->bits */
+lencode_state    equ    (64+4+addstr)   ;/* state->lencode */
+distcode_state   equ    (68+4+addstr)   ;/* state->distcode */
+lenbits_state    equ    (72+4+addstr)   ;/* state->lenbits */
+distbits_state   equ    (76+4+addstr)   ;/* state->distbits */
 
 
 ;;SECTION .text