diff --git a/libswscale/rgb2rgb_template.c b/libswscale/rgb2rgb_template.c
index 1a5464a8c9fe916545b74fb81792df39ce5a2ff4..cdb5c8e7c8c6b9ceda0e2d6ff189b2fdd20e5aa3 100644
--- a/libswscale/rgb2rgb_template.c
+++ b/libswscale/rgb2rgb_template.c
@@ -34,7 +34,6 @@
 #undef EMMS
 #undef SFENCE
 #undef MMREG_SIZE
-#undef PREFETCHW
 #undef PAVGB
 
 #if HAVE_SSE2
@@ -45,15 +44,12 @@
 
 #if HAVE_AMD3DNOW
 #define PREFETCH  "prefetch"
-#define PREFETCHW "prefetchw"
 #define PAVGB     "pavgusb"
 #elif HAVE_MMX2
 #define PREFETCH "prefetchnta"
-#define PREFETCHW "prefetcht0"
 #define PAVGB     "pavgb"
 #else
 #define PREFETCH  " # nop"
-#define PREFETCHW " # nop"
 #endif
 
 #if HAVE_AMD3DNOW
diff --git a/libswscale/swscale_template.c b/libswscale/swscale_template.c
index d14cf8f4a422d68d945448662617e36f95a3583b..9aa9bd8d417eb04fc4c8ab3c2f41ddac3cd203cd 100644
--- a/libswscale/swscale_template.c
+++ b/libswscale/swscale_template.c
@@ -25,17 +25,13 @@
 #undef MOVNTQ
 #undef PAVGB
 #undef PREFETCH
-#undef PREFETCHW
 
 #if COMPILE_TEMPLATE_AMD3DNOW
 #define PREFETCH  "prefetch"
-#define PREFETCHW "prefetchw"
 #elif COMPILE_TEMPLATE_MMX2
 #define PREFETCH "prefetchnta"
-#define PREFETCHW "prefetcht0"
 #else
 #define PREFETCH  " # nop"
-#define PREFETCHW " # nop"
 #endif
 
 #if COMPILE_TEMPLATE_MMX2