diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index cc74c83af5..7e16592b6c 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -70,8 +70,6 @@ void ff_avg_pixels16_l2_mmxext(uint8_t *dst, uint8_t *src1, uint8_t *src2,
                                int dstStride, int src1Stride, int h);
 void ff_put_no_rnd_pixels16_l2_mmxext(uint8_t *dst, uint8_t *src1, uint8_t *src2,
                                       int dstStride, int src1Stride, int h);
-void ff_avg_pixels8_mmxext(uint8_t *block, const uint8_t *pixels,
-                           ptrdiff_t line_size, int h);
 
 static void ff_put_pixels16_mmxext(uint8_t *block, const uint8_t *pixels,
                                    ptrdiff_t line_size, int h)
diff --git a/libavcodec/x86/hpeldsp_init.c b/libavcodec/x86/hpeldsp_init.c
index d4d5b2043c..c9bdf8242d 100644
--- a/libavcodec/x86/hpeldsp_init.c
+++ b/libavcodec/x86/hpeldsp_init.c
@@ -284,11 +284,6 @@ static void put_pixels16_mmx(uint8_t *block, const uint8_t *pixels,
 }
 #endif /* HAVE_INLINE_ASM */
 
-void ff_put_pixels16_sse2(uint8_t *block, const uint8_t *pixels,
-                          ptrdiff_t line_size, int h);
-void ff_avg_pixels16_sse2(uint8_t *block, const uint8_t *pixels,
-                          ptrdiff_t line_size, int h);
-
 #define SET_HPEL_FUNCS(PFX, IDX, SIZE, CPU)                                     \
     do {                                                                        \
         c->PFX ## _pixels_tab IDX [0] = PFX ## _pixels ## SIZE ## _     ## CPU; \