diff --git a/contrib/sdk/sources/SDL-1.2.2/src/Tupfile.lua b/contrib/sdk/sources/SDL-1.2.2/src/Tupfile.lua
index 9632fc2549..f4d60f4263 100644
--- a/contrib/sdk/sources/SDL-1.2.2/src/Tupfile.lua
+++ b/contrib/sdk/sources/SDL-1.2.2/src/Tupfile.lua
@@ -26,7 +26,7 @@ FOLDERS = {
 for i,v in ipairs(FOLDERS) do
   compile_gcc(v .. "*.c", v .. "%B.o")
   tup.append_table(OBJS,
-    tup.foreach_rule(v .. "*.asm", "nasm -f coff -o %o %f", v .. "%B.o")
+    tup.foreach_rule(v .. "*.asm", "nasm -f win32 -o %o %f", v .. "%B.o")
   )
 end
 tup.rule(OBJS, "kos32-ar rcs %o %f", {"../../../lib/libSDL.a", "../../../lib/<libSDL>"})