diff --git a/src/video/SDL_RLEaccel.c b/src/video/SDL_RLEaccel.c
index 4ff099b2b..8fb3cb276 100644
--- a/src/video/SDL_RLEaccel.c
+++ b/src/video/SDL_RLEaccel.c
@@ -91,7 +91,8 @@
 #include "SDL_blit.h"
 #include "SDL_RLEaccel_c.h"
 
-#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES
+/* Force MMX to 0; this blows up on almost every major compiler now. --ryan. */
+#if 0 && defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES
 #define MMX_ASMBLIT
 #endif
 
diff --git a/src/video/SDL_blit_A.c b/src/video/SDL_blit_A.c
index 4ecb5215e..4ea599701 100644
--- a/src/video/SDL_blit_A.c
+++ b/src/video/SDL_blit_A.c
@@ -32,7 +32,8 @@
 
 #if SDL_ASSEMBLY_ROUTINES
 #  if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
-#    define MMX_ASMBLIT 1
+     /* forced MMX to 0...it breaks on most compilers now.  --ryan. */
+#    define MMX_ASMBLIT 0
 #    define GCC_ASMBLIT 1
 #  elif defined(_MSC_VER) && defined(_M_IX86)
 #    if (_MSC_VER <= 1200)