diff --git a/src/stub/i086-dos16.exe.h b/src/stub/i086-dos16.exe.h
index 664145ae..765c4a8f 100644
--- a/src/stub/i086-dos16.exe.h
+++ b/src/stub/i086-dos16.exe.h
@@ -29,8 +29,8 @@
 
 
 #define STUB_I086_DOS16_EXE_SIZE    26115
-#define STUB_I086_DOS16_EXE_ADLER32 0xb6566a4a
-#define STUB_I086_DOS16_EXE_CRC32   0x351200ce
+#define STUB_I086_DOS16_EXE_ADLER32 0x77786a12
+#define STUB_I086_DOS16_EXE_CRC32   0xa68e9be0
 
 unsigned char stub_i086_dos16_exe[26115] = {
 127, 69, 76, 70,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,   /* 0x   0 */
@@ -76,8 +76,8 @@ unsigned char stub_i086_dos16_exe[26115] = {
  51,  0,255,117,  3,232,  6,  0, 17,201,  0,255,117,  2,138, 60,   /* 0x 280 */
  17,246,115,  5,128,198,  8,142,218,209,238, 70, 16,255,195,139,   /* 0x 290 */
  94,162,  9,195,137, 94,248,137, 86,252,139, 70,244,140,218,187,   /* 0x 2a0 */
-  1,  0, 49,201,  1,216,131,209,  0,137,217,177, 12,211,227,  1,   /* 0x 2b0 */
-218,137, 70,244,142,218,195,  1,216,131,209,  0,137,217,177, 12,   /* 0x 2c0 */
+  1,  0, 49,201,  1,216,131,209,  0,137,203,177, 12,211,227,  1,   /* 0x 2b0 */
+218,137, 70,244,142,218,195,  1,216,131,209,  0,137,203,177, 12,   /* 0x 2c0 */
 211,227,  1,218,195,139, 70,244,140,218,139, 94,230,139, 78,232,   /* 0x 2d0 */
  57,202,117,  2, 57,216,195, 38,139, 31,139, 70,154,139, 86,156,   /* 0x 2e0 */
  49,201,137, 70,246,137, 86,250,195, 49,201,195,204,137,229,141,   /* 0x 2f0 */
@@ -175,7 +175,7 @@ unsigned char stub_i086_dos16_exe[26115] = {
   8,  0,209,224,209,210,226,250,232,254,255,137,118,154,137,126,   /* 0x 8b0 */
 156,185, 11,  0,209,110,156,209, 94,154,226,248,196, 94,240,232,   /* 0x 8c0 */
  70,  0,139, 70,244,140,218,187,  1,  0, 49,201,  1,216,131,209,   /* 0x 8d0 */
-  0,137,217,177, 12,211,227,  1,218,137, 70,172,137, 86,170,139,   /* 0x 8e0 */
+  0,137,203,177, 12,211,227,  1,218,137, 70,172,137, 86,170,139,   /* 0x 8e0 */
  70,252, 59, 70,250,114, 13,116,  3,233, 65,  1,139, 70,248, 59,   /* 0x 8f0 */
  70,246,115,245,139,118,246,139,126,250,184,  0,  8,139, 94,240,   /* 0x 900 */
  38, 43,  7,177,  5,211,232, 38,  1,  7,139, 86,238,211,226,139,   /* 0x 910 */
@@ -409,7 +409,7 @@ unsigned char stub_i086_dos16_exe[26115] = {
 252,185,  8,  0,209,224,209,210,226,250,232,254,255,137,118,154,   /* 0x1750 */
 137,126,156,185, 11,  0,209,110,156,209, 94,154,226,248,196, 94,   /* 0x1760 */
 240,232, 70,  0,139, 70,244,140,218,187,  1,  0, 49,201,  1,216,   /* 0x1770 */
-131,209,  0,137,217,177, 12,211,227,  1,218,137, 70,172,137, 86,   /* 0x1780 */
+131,209,  0,137,203,177, 12,211,227,  1,218,137, 70,172,137, 86,   /* 0x1780 */
 170,139, 70,252, 59, 70,250,114, 13,116,  3,233, 65,  1,139, 70,   /* 0x1790 */
 248, 59, 70,246,115,245,139,118,246,139,126,250,184,  0,  8,139,   /* 0x17a0 */
  94,240, 38, 43,  7,177,  5,211,232, 38,  1,  7,139, 86,238,211,   /* 0x17b0 */
diff --git a/src/stub/src/arch/i086/macros.S b/src/stub/src/arch/i086/macros.S
index ee1253b4..62a08891 100644
--- a/src/stub/src/arch/i086/macros.S
+++ b/src/stub/src/arch/i086/macros.S
@@ -142,7 +142,7 @@
 .macro          M_WCC_PIA
                 add     ax, bx
                 adc     cx, 0
-                mov     cx, bx
+                mov     bx, cx
                 mov     cl, __AHSHIFT
                 shl     bx, cl
                 add     dx, bx
@@ -153,7 +153,7 @@
 .macro          M_WCC_PIS
                 sub     ax, bx
                 adc     cx, 0
-                mov     cx, bx
+                mov     bx, cx
                 mov     cl, __AHSHIFT
                 shl     bx, cl
                 sub     dx, bx