diff --git a/libavcodec/bmp.c b/libavcodec/bmp.c
index 40010ac46f..77b8e35eba 100644
--- a/libavcodec/bmp.c
+++ b/libavcodec/bmp.c
@@ -130,7 +130,7 @@ static int bmp_decode_frame(AVCodecContext *avctx,
         rgb[1] = bytestream_get_le32(&buf);
         rgb[2] = bytestream_get_le32(&buf);
         if (ihsize > 40)
-        alpha = bytestream_get_le32(&buf);
+            alpha = bytestream_get_le32(&buf);
     }
 
     ret = ff_set_dimensions(avctx, width, height > 0 ? height : -(unsigned)height);