diff --git a/libavcodec/mpc7.c b/libavcodec/mpc7.c
index 75f65163ea..a15f117427 100644
--- a/libavcodec/mpc7.c
+++ b/libavcodec/mpc7.c
@@ -40,7 +40,7 @@
 
 static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];
 
-static uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES*2 + 1] =
+static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES*2 + 1] =
 {
        0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
        5636, 6164, 6676, 7224
diff --git a/libavcodec/mpc8.c b/libavcodec/mpc8.c
index adee15f534..349a01e952 100644
--- a/libavcodec/mpc8.c
+++ b/libavcodec/mpc8.c
@@ -88,7 +88,7 @@ static int mpc8_get_mask(GetBitContext *gb, int size, int t)
     return mask;
 }
 
-static int vlc_offsets[13] = {
+static const uint16_t vlc_offsets[13] = {
     0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708
 };