diff --git a/libavutil/crc.c b/libavutil/crc.c
index 430d8f594dc3f49b0eb2e3e03c9fa92e66a3f791..13be2020d32c96fb5a907361259ead8a4902dd32 100644
--- a/libavutil/crc.c
+++ b/libavutil/crc.c
@@ -33,10 +33,12 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
         }
     }
     ctx[256]=1;
+#ifndef CONFIG_SMALL
     if(ctx_size >= sizeof(AVCRC)*1024)
         for (i = 0; i < 256; i++)
             for(j=0; j<3; j++)
                 ctx[256*(j+1) + i]= (ctx[256*j + i]>>8) ^ ctx[ ctx[256*j + i]&0xFF ];
+#endif
 
     return 0;
 }
@@ -44,6 +46,7 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
 uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length){
     const uint8_t *end= buffer+length;
 
+#ifndef CONFIG_SMALL
     if(!ctx[256])
         while(buffer<end-3){
             crc ^= le2me_32(*(uint32_t*)buffer); buffer+=4;
@@ -52,6 +55,7 @@ uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t le
                   ^ctx[1*256 + ((crc>>16)&0xFF)]
                   ^ctx[0*256 + ((crc>>24)     )];
         }
+#endif
     while(buffer<end)
         crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8);