diff --git a/libavcodec/amrnbdec.c b/libavcodec/amrnbdec.c
index 2883b9c398..55dc8b05f5 100644
--- a/libavcodec/amrnbdec.c
+++ b/libavcodec/amrnbdec.c
@@ -1044,5 +1044,5 @@ AVCodec ff_amrnb_decoder = {
     .init           = amrnb_decode_init,
     .decode         = amrnb_decode_frame,
     .long_name      = NULL_IF_CONFIG_SMALL("Adaptive Multi-Rate NarrowBand"),
-    .sample_fmts    = (enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
+    .sample_fmts    = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
 };
diff --git a/libavcodec/amrwbdec.c b/libavcodec/amrwbdec.c
index 90bf1d5fdf..fa3f8dd050 100644
--- a/libavcodec/amrwbdec.c
+++ b/libavcodec/amrwbdec.c
@@ -1233,5 +1233,5 @@ AVCodec ff_amrwb_decoder = {
     .init           = amrwb_decode_init,
     .decode         = amrwb_decode_frame,
     .long_name      = NULL_IF_CONFIG_SMALL("Adaptive Multi-Rate WideBand"),
-    .sample_fmts    = (enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
+    .sample_fmts    = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
 };
diff --git a/libavcodec/g722.c b/libavcodec/g722.c
index 0efc390afc..f00fa6a0e2 100644
--- a/libavcodec/g722.c
+++ b/libavcodec/g722.c
@@ -577,7 +577,7 @@ AVCodec ff_adpcm_g722_encoder = {
     .close          = g722_close,
     .encode         = g722_encode_frame,
     .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
-    .sample_fmts    = (enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
+    .sample_fmts    = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
 };
 #endif