diff --git a/libavformat/cinedec.c b/libavformat/cinedec.c
index 5e16032999..372088495e 100644
--- a/libavformat/cinedec.c
+++ b/libavformat/cinedec.c
@@ -125,8 +125,10 @@ static int cine_read_header(AVFormatContext *avctx)
         return AVERROR_INVALIDDATA;
 
     biBitCount = avio_rl16(pb);
-    if (biBitCount != 8 && biBitCount != 16 && biBitCount != 24 && biBitCount != 48)
+    if (biBitCount != 8 && biBitCount != 16 && biBitCount != 24 && biBitCount != 48) {
+        avpriv_request_sample(avctx, "unsupported biBitCount %i", biBitCount);
         return AVERROR_INVALIDDATA;
+    }
 
     switch (avio_rl32(pb)) {
     case BMP_RGB: