diff --git a/src/sys/graphics/objgfx30.cpp b/src/sys/graphics/objgfx30.cpp
index 1ace08f..5ce0e3e 100755
--- a/src/sys/graphics/objgfx30.cpp
+++ b/src/sys/graphics/objgfx30.cpp
@@ -127,25 +127,25 @@
       "xor     %%eax,%%eax    \n"
       "lop:                   \n"
       "  pushl %%eax          \n"
-      "  mov   (%%esi),%%al   \n"
+      "  movl  (%%esi),%%eax  \n"
       "  incl  %%esi          \n"
       "  sub   %1,%%al        \n"
       "  jns   abs1           \n"
-      "  neg   %%al           \n"
+      "  negl   %%eax         \n"
       "abs1:                  \n"
       "  movl   %%eax,%%edi   \n"
       "  mov   (%%esi),%%al   \n"
       "  incl  %%esi          \n"
       "  sub   %2,%%al        \n"
       "  jns   abs2           \n"
-      "  neg   %%al           \n"
+      "  neg   %%eax          \n"
       "abs2:                  \n"
       "  add   %%eax,%%edi    \n"
-      "  mov   (%%esi),%%al   \n"
+      "  mov   (%%esi),%%eax  \n"
       "  incl  %%esi          \n"
       "  sub   %3,%%al        \n"
       "  jns   abs3           \n"
-      "  neg   %%al           \n"
+      "  neg   %%eax          \n"
       "abs3:                  \n"
       "  addl  %%eax,%%edi    \n"
       "  popl  %%eax          \n"