diff --git a/libavcodec/cavsdsp.c b/libavcodec/cavsdsp.c
index 904e2dfe76..653b112980 100644
--- a/libavcodec/cavsdsp.c
+++ b/libavcodec/cavsdsp.c
@@ -186,7 +186,7 @@ static void cavs_filter_ch_c(uint8_t *d, int stride, int alpha, int beta, int tc
 static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) {
     int i;
     int16_t (*src)[8] = (int16_t(*)[8])block;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     src[0][0] += 8;
 
@@ -261,7 +261,7 @@ static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) {
 #define CAVS_SUBPIX(OPNAME, OP, NAME, A, B, C, D, E, F) \
 static void OPNAME ## cavs_filt8_h_ ## NAME(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int h=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<h; i++)\
     {\
@@ -280,7 +280,7 @@ static void OPNAME ## cavs_filt8_h_ ## NAME(uint8_t *dst, uint8_t *src, int dstS
 \
 static void OPNAME ## cavs_filt8_v_  ## NAME(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<w; i++)\
     {\
@@ -334,7 +334,7 @@ static void OPNAME ## cavs_filt8_hv_ ## NAME(uint8_t *dst, uint8_t *src1, uint8_
     int16_t *tmp = temp;\
     const int h=8;\
     const int w=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     src1 -= 2*srcStride;\
     for(i=0; i<h+5; i++)\