diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c
index aa728f62c1e1ddc01994dbbce4889d012ae91fd5..1820f80443018a0fb209d50681b536aacec693f5 100644
--- a/libavcodec/aacsbr.c
+++ b/libavcodec/aacsbr.c
@@ -399,6 +399,8 @@ static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
         max_qmf_subbands = 35;
     } else if (sbr->sample_rate >= 48000)
         max_qmf_subbands = 32;
+    else
+        av_assert0(0);
 
     if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) {
         av_log(ac->avctx, AV_LOG_ERROR,