diff --git a/libavcodec/amrnbdec.c b/libavcodec/amrnbdec.c
index f21b738685575a4746ce5ea05c7d33df955aa7fa..4e24e26d68e9f8c05f5571accd836a3da4096401 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 00df227b5ee63492b8e11187e715c3281c99674c..d4bb7760efe666a94c08052c4f865bdd32e292aa 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 422a1343baa7f4bca338a7be724091dd92aca975..257292de7f495fbddcd06bb28afb745befcad395 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
 
diff --git a/libavcodec/libvo-aacenc.c b/libavcodec/libvo-aacenc.c
index 65c2745695e33c0b3415c0b2b559e0d49ac7fd45..eb340580a5dcaa91d14bff3fe3dc8abfa714e474 100644
--- a/libavcodec/libvo-aacenc.c
+++ b/libavcodec/libvo-aacenc.c
@@ -122,7 +122,7 @@ AVCodec ff_libvo_aacenc_encoder = {
     aac_encode_frame,
     aac_encode_close,
     NULL,
-    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("libvo-aacenc AAC"),
 };
 
diff --git a/libavcodec/libvo-amrwbenc.c b/libavcodec/libvo-amrwbenc.c
index 6f26d9b8af52f2183254aca0cb4df408cb7a7262..45da104f940c75603667ed2c1e9dd88d37f5b76b 100644
--- a/libavcodec/libvo-amrwbenc.c
+++ b/libavcodec/libvo-amrwbenc.c
@@ -120,7 +120,7 @@ AVCodec ff_libvo_amrwbenc_encoder = {
     amr_wb_encode_frame,
     amr_wb_encode_close,
     NULL,
-    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("libvo-amrwbenc Adaptive Multi-Rate "
                                       "(AMR) Wide-Band"),
 };