diff --git a/libavformat/fsb.c b/libavformat/fsb.c
index 0febeffd56..1164f48b94 100644
--- a/libavformat/fsb.c
+++ b/libavformat/fsb.c
@@ -23,6 +23,7 @@
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "avio.h"
+#include "avio_internal.h"
 #include "demux.h"
 #include "internal.h"
 
@@ -93,7 +94,9 @@ static int fsb_read_header(AVFormatContext *s)
                 return ret;
             avio_seek(pb, 0x68, SEEK_SET);
             for (c = 0; c < par->ch_layout.nb_channels; c++) {
-                avio_read(pb, par->extradata + 32 * c, 32);
+                ret = ffio_read_size(pb, par->extradata + 32 * c, 32);
+                if (ret < 0)
+                    return ret;
                 avio_skip(pb, 14);
             }
         } else {
@@ -146,7 +149,9 @@ static int fsb_read_header(AVFormatContext *s)
                 return ret;
             avio_seek(pb, 0x80, SEEK_SET);
             for (c = 0; c < par->ch_layout.nb_channels; c++) {
-                avio_read(pb, par->extradata + 32 * c, 32);
+                ret = ffio_read_size(pb, par->extradata + 32 * c, 32);
+                if (ret < 0)
+                    return ret;
                 avio_skip(pb, 14);
             }
             par->block_align = 8 * par->ch_layout.nb_channels;