diff --git a/libavcodec/imm5.c b/libavcodec/imm5.c
index 7bb77b5e7a..b1cda453c9 100644
--- a/libavcodec/imm5.c
+++ b/libavcodec/imm5.c
@@ -136,6 +136,8 @@ static int imm5_decode_frame(AVCodecContext *avctx, AVFrame *frame,
     }
 
     ret = avcodec_receive_frame(codec_avctx, frame);
+    if (ret == AVERROR(EAGAIN))
+        return avpkt->size;
     if (ret < 0)
         return ret;