diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index 2a2993b865..926b17e23f 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -916,7 +916,7 @@ static int audio_element_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
         if (ret < 0)
             goto fail;
     } else {
-        av_assert0(0);
+        av_unreachable("audio_element_type should have been checked above");
     }
 
     c->audio_elements[c->nb_audio_elements++] = audio_element;
diff --git a/libavformat/iamf_reader.c b/libavformat/iamf_reader.c
index b620a44f19..418ab5d1c1 100644
--- a/libavformat/iamf_reader.c
+++ b/libavformat/iamf_reader.c
@@ -257,7 +257,7 @@ static int parameter_block_obu(AVFormatContext *s, IAMFDemuxContext *c,
             break;
         }
         default:
-            av_assert0(0);
+            av_unreachable("param_definition_type should have been checked in descriptor");
         }
     }
 
@@ -290,7 +290,7 @@ static int parameter_block_obu(AVFormatContext *s, IAMFDemuxContext *c,
         c->recon_size = out_param_size;
         break;
     default:
-        av_assert0(0);
+        av_unreachable("param_definition_type should have been checked in descriptor");
     }
 
     ret = 0;
diff --git a/libavformat/iamf_writer.c b/libavformat/iamf_writer.c
index e1820a7096..fcf7929830 100644
--- a/libavformat/iamf_writer.c
+++ b/libavformat/iamf_writer.c
@@ -1146,7 +1146,7 @@ static int write_parameter_block(const IAMFContext *iamf, AVIOContext *pb,
             break;
         }
         default:
-            av_assert0(0);
+            av_unreachable("param_definition_type should have been checked above");
         }
     }