diff --git a/etc/codecs.conf b/etc/codecs.conf
index 7e912e3afd..bfb9b018f2 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -4283,6 +4283,17 @@ audiocodec imaadpcmacm
   driver acm
   dll "imaadp32.acm"
 
+audiocodec libgsmms
+  info "libgsm MS GSM"
+  status working
+  format 0x31
+  format 0x32
+  format 0x204D5347
+  format 0x1500
+  fourcc agsm
+  driver ffmpeg
+  dll "libgsm_ms"
+
 audiocodec msgsm
   info "MS GSM"
   status working