diff --git a/libavcodec/vlc.h b/libavcodec/vlc.h
index 42ccddf3fc..7cb323b62c 100644
--- a/libavcodec/vlc.h
+++ b/libavcodec/vlc.h
@@ -35,7 +35,12 @@ typedef struct RL_VLC_ELEM {
     uint8_t run;
 } RL_VLC_ELEM;
 
-#define init_vlc(vlc, nb_bits, nb_codes,                \
+#define INIT_VLC_DEFAULT_SIZES(ptr) \
+    (ptr), sizeof((ptr)[0]), sizeof((ptr)[0])
+
+#define init_vlc(...) init_vlc2(__VA_ARGS__)
+
+#define init_vlc2(vlc, nb_bits, nb_codes,               \
                  bits, bits_wrap, bits_size,            \
                  codes, codes_wrap, codes_size,         \
                  flags)                                 \