diff --git a/libavcodec/av1_parse.h b/libavcodec/av1_parse.h
index 01bcd646c2ea8..ae0ebb5a1850a 100644
--- a/libavcodec/av1_parse.h
+++ b/libavcodec/av1_parse.h
@@ -27,6 +27,9 @@
 #include "avcodec.h"
 #include "get_bits.h"
 
+// OBU header fields + max leb128 length
+#define MAX_OBU_HEADER_SIZE (2 + 8)
+
 typedef struct AV1OBU {
     /** Size of payload */
     int size;
@@ -105,7 +108,7 @@ static inline int parse_obu_header(const uint8_t *buf, int buf_size,
     int ret, extension_flag, has_size_flag;
     int64_t size;
 
-    ret = init_get_bits8(&gb, buf, FFMIN(buf_size, 2 + 8)); // OBU header fields + max leb128 length
+    ret = init_get_bits8(&gb, buf, FFMIN(buf_size, MAX_OBU_HEADER_SIZE));
     if (ret < 0)
         return ret;