diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index 4e7bc8c443..245efbd36e 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -31,9 +31,6 @@
 #include "mathops.h"
 #include "h263.h"
 
-#undef NDEBUG
-#include <assert.h>
-
 
 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
                               int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
@@ -147,7 +144,7 @@ static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int
     int16_t *tmpI= tmpIt;
     uint8_t *tmp2= tmp2t[0];
     const uint8_t *hpel[11];
-    assert(dx<16 && dy<16);
+    av_assert2(dx<16 && dy<16);
     r= brane[dx + 16*dy]&15;
     l= brane[dx + 16*dy]>>4;
 
@@ -347,8 +344,8 @@ void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride,
 
 //        assert(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h);
 //        assert(!(b_w&(b_w-1)));
-        assert(b_w>1 && b_h>1);
-        assert((tab_index>=0 && tab_index<4) || b_w==32);
+        av_assert2(b_w>1 && b_h>1);
+        av_assert2((tab_index>=0 && tab_index<4) || b_w==32);
         if((dx&3) || (dy&3) || !(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h) || (b_w&(b_w-1)) || !s->plane[plane_index].fast_mc )
             mc_block(&s->plane[plane_index], dst, src, stride, b_w, b_h, dx, dy);
         else if(b_w==32){
@@ -363,7 +360,7 @@ void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride,
             s->dsp.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst    ,src + 3       + 3*stride,stride);
             s->dsp.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst+b_h,src + 3 + b_h + 3*stride,stride);
         }else{
-            assert(2*b_w==b_h);
+            av_assert2(2*b_w==b_h);
             s->dsp.put_h264_qpel_pixels_tab[tab_index  ][dy+(dx>>2)](dst           ,src + 3 + 3*stride           ,stride);
             s->dsp.put_h264_qpel_pixels_tab[tab_index  ][dy+(dx>>2)](dst+b_w*stride,src + 3 + 3*stride+b_w*stride,stride);
         }
@@ -372,7 +369,7 @@ void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride,
 
 #define mca(dx,dy,b_w)\
 static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, int stride, int h){\
-    assert(h==b_w);\
+    av_assert2(h==b_w);\
     mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\
 }