diff --git a/libavcodec/psymodel.c b/libavcodec/psymodel.c
index 890b13e1c8..1720e9b09b 100644
--- a/libavcodec/psymodel.c
+++ b/libavcodec/psymodel.c
@@ -37,8 +37,8 @@ av_cold int ff_psy_init(FFPsyContext *ctx, AVCodecContext *avctx, int num_lens,
     ctx->avctx = avctx;
     ctx->ch        = av_calloc(avctx->ch_layout.nb_channels, 2 * sizeof(ctx->ch[0]));
     ctx->group     = av_calloc(num_groups, sizeof(ctx->group[0]));
-    ctx->bands     = av_malloc_array (sizeof(ctx->bands[0]),      num_lens);
-    ctx->num_bands = av_malloc_array (sizeof(ctx->num_bands[0]),  num_lens);
+    ctx->bands     = av_memdup(bands,     num_lens * sizeof(ctx->bands[0]));
+    ctx->num_bands = av_memdup(num_bands, num_lens * sizeof(ctx->num_bands[0]));
     ctx->cutoff    = avctx->cutoff;
 
     if (!ctx->ch || !ctx->group || !ctx->bands || !ctx->num_bands) {
@@ -46,9 +46,6 @@ av_cold int ff_psy_init(FFPsyContext *ctx, AVCodecContext *avctx, int num_lens,
         return AVERROR(ENOMEM);
     }
 
-    memcpy(ctx->bands,     bands,     sizeof(ctx->bands[0])     *  num_lens);
-    memcpy(ctx->num_bands, num_bands, sizeof(ctx->num_bands[0]) *  num_lens);
-
     /* assign channels to groups (with virtual channels for coupling) */
     for (i = 0; i < num_groups; i++) {
         /* NOTE: Add 1 to handle the AAC chan_config without modification.