diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index e048cd973e..b1be487f77 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -457,6 +457,8 @@ static av_cold int g726_decode_init(AVCodecContext *avctx)
     g726_reset(c);
 
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+    if (!avctx->sample_rate)
+        avctx->sample_rate = 8000;
 
     return 0;
 }