diff --git a/etc/codecs.conf b/etc/codecs.conf
index 20f5867598..bd375117dc 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -3614,6 +3614,7 @@ audiocodec ffamrnb
   info "AMR Narrowband"
   status working
   fourcc samr
+  format 0x57 ;amr in avi
   driver ffmpeg
   dll "libamr_nb"
 
@@ -3621,6 +3622,7 @@ audiocodec ffamrwb
   info "AMR Wideband"
   status working
   fourcc sawb
+  format 0x58 ;amr in avi
   driver ffmpeg
   dll "libamr_wb"