diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index 00bbe58149..bb6d94bda5 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -2195,9 +2195,9 @@ static int mxf_parse_dv_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 static const struct {
     UID uid;
     int frame_size;
-    int profile;
+    uint8_t profile;
     uint8_t interlaced;
-    int intra_only; // 1 or 0 when there are separate UIDs for Long GOP and Intra, -1 when Intra/LGOP detection can be ignored
+    int8_t intra_only; // 1 or 0 when there are separate UIDs for Long GOP and Intra, -1 when Intra/LGOP detection can be ignored
 } mxf_h264_codec_uls[] = {
     {{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0a,0x04,0x01,0x02,0x02,0x01,0x31,0x11,0x01 },      0,  66, 0, -1 }, // AVC Baseline
     {{ 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0a,0x04,0x01,0x02,0x02,0x01,0x31,0x20,0x01 },      0,  77, 0, -1 }, // AVC Main