diff --git a/libavcodec/vp6data.h b/libavcodec/vp6data.h
index 5a387cc756..ba4c7abf74 100644
--- a/libavcodec/vp6data.h
+++ b/libavcodec/vp6data.h
@@ -275,7 +275,7 @@ static const int16_t vp6_block_copy_filter[16][8][4] = {
     {  -2,  18, 124, -12  } },
 };
 
-const vp56_tree_t vp6_pcr_tree[] = {
+static const vp56_tree_t vp6_pcr_tree[] = {
     { 8, 0},
     { 4, 1},
     { 2, 2}, {-1}, {-2},