diff --git a/libfreerdp/codec/dsp_ffmpeg.c b/libfreerdp/codec/dsp_ffmpeg.c
index 4e4a07c7a..0af3cf4fc 100644
--- a/libfreerdp/codec/dsp_ffmpeg.c
+++ b/libfreerdp/codec/dsp_ffmpeg.c
@@ -79,6 +79,7 @@ static BOOL ffmpeg_codec_is_filtered(enum AVCodecID id, BOOL encoder)
 		case AV_CODEC_ID_NONE:
 			return TRUE;
 
+		case AV_CODEC_ID_GSM_MS:
 		case AV_CODEC_ID_AAC:
 		case AV_CODEC_ID_AAC_LATM:
 #if !defined(WITH_DSP_EXPERIMENTAL)