diff --git a/libswresample/x86/rematrix.asm b/libswresample/x86/rematrix.asm
index 7984b9a729..968010701e 100644
--- a/libswresample/x86/rematrix.asm
+++ b/libswresample/x86/rematrix.asm
@@ -223,12 +223,6 @@ mix_2_1_int16_u_int %+ SUFFIX:
 %endmacro
 
 
-INIT_MMX mmx
-MIX1_INT16 u
-MIX1_INT16 a
-MIX2_INT16 u
-MIX2_INT16 a
-
 INIT_XMM sse
 MIX2_FLT u
 MIX2_FLT a
diff --git a/libswresample/x86/rematrix_init.c b/libswresample/x86/rematrix_init.c
index 0608c74e7f..b6ed38bf67 100644
--- a/libswresample/x86/rematrix_init.c
+++ b/libswresample/x86/rematrix_init.c
@@ -28,7 +28,6 @@ mix_2_1_func_type ff_mix_2_1_a_## type ## _ ## simd;
 
 D(float, sse)
 D(float, avx)
-D(int16, mmx)
 D(int16, sse2)
 
 av_cold int swri_rematrix_init_x86(struct SwrContext *s){
@@ -43,10 +42,6 @@ av_cold int swri_rematrix_init_x86(struct SwrContext *s){
     s->mix_2_1_simd = NULL;
 
     if (s->midbuf.fmt == AV_SAMPLE_FMT_S16P){
-        if(EXTERNAL_MMX(mm_flags)) {
-            s->mix_1_1_simd = ff_mix_1_1_a_int16_mmx;
-            s->mix_2_1_simd = ff_mix_2_1_a_int16_mmx;
-        }
         if(EXTERNAL_SSE2(mm_flags)) {
             s->mix_1_1_simd = ff_mix_1_1_a_int16_sse2;
             s->mix_2_1_simd = ff_mix_2_1_a_int16_sse2;