diff --git a/libavcodec/svq1_cb.h b/libavcodec/svq1_cb.h
index 5c98c80474..ef097457e1 100644
--- a/libavcodec/svq1_cb.h
+++ b/libavcodec/svq1_cb.h
@@ -764,9 +764,10 @@ static const int8_t svq1_inter_codebook_8x8[6144] = {
 };
 
 /* list of codebooks for inter-coded vectors */
-static const int8_t* const svq1_inter_codebooks[4] = {
+static const int8_t* const svq1_inter_codebooks[6] = {
     svq1_inter_codebook_4x2, svq1_inter_codebook_4x4,
-    svq1_inter_codebook_8x4, svq1_inter_codebook_8x8
+    svq1_inter_codebook_8x4, svq1_inter_codebook_8x8,
+    NULL, NULL,
 };
 
 static const int8_t svq1_inter_codebook_sum[4][16*6] = {
@@ -1538,9 +1539,10 @@ static const int8_t svq1_intra_codebook_8x8[6144] = {
 };
 
 /* list of codebooks for intra-coded vectors */
-static const int8_t* const svq1_intra_codebooks[4] = {
+static const int8_t* const svq1_intra_codebooks[6] = {
     svq1_intra_codebook_4x2, svq1_intra_codebook_4x4,
-    svq1_intra_codebook_8x4, svq1_intra_codebook_8x8
+    svq1_intra_codebook_8x4, svq1_intra_codebook_8x8,
+    NULL, NULL,
 };
 
 static const int8_t svq1_intra_codebook_sum[4][16*6] = {