diff --git a/common/pixel.c b/common/pixel.c
index cf6ae03..adc9d82 100644
--- a/common/pixel.c
+++ b/common/pixel.c
@@ -674,7 +674,8 @@ void x264_pixel_init( int cpu, x264_pixel_function_t *pixf )
         INIT2( sad, _sse2 );
         INIT2( sad_x3, _sse2 );
         INIT2( sad_x4, _sse2 );
-        INIT4( hadamard_ac, _sse2 );
+        if (!(cpu&X264_CPU_STACK_MOD4))
+            INIT4( hadamard_ac, _sse2 );
         INIT_ADS( _sse2 );
         pixf->var[PIXEL_8x8] = x264_pixel_var_8x8_sse2;
         pixf->intra_sad_x3_16x16 = x264_intra_sad_x3_16x16_sse2;
@@ -716,7 +717,8 @@ void x264_pixel_init( int cpu, x264_pixel_function_t *pixf )
         INIT7( satd, _ssse3 );
         INIT7( satd_x3, _ssse3 );
         INIT7( satd_x4, _ssse3 );
-        INIT4( hadamard_ac, _ssse3 );
+        if (!(cpu&X264_CPU_STACK_MOD4))
+            INIT4( hadamard_ac, _ssse3 );
         INIT_ADS( _ssse3 );
         pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_ssse3;
         pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_ssse3;