diff --git a/vp9/common/vp9_common_data.c b/vp9/common/vp9_common_data.c
index a927823e04b8c8be2c064734bc69a78e93795351..d4c1b7124de9491aed925a202fa3c8458e786e48 100644
--- a/vp9/common/vp9_common_data.c
+++ b/vp9/common/vp9_common_data.c
@@ -107,6 +107,13 @@ const TX_SIZE max_txsize_lookup[BLOCK_SIZES] = {
   TX_32X32, TX_32X32, TX_32X32, TX_32X32
 };
 
+const BLOCK_SIZE txsize_to_bsize[TX_SIZES] = {
+    BLOCK_4X4,  // TX_4X4
+    BLOCK_8X8,  // TX_8X8
+    BLOCK_16X16,  // TX_16X16
+    BLOCK_32X32,  // TX_32X32
+};
+
 const TX_SIZE tx_mode_to_biggest_tx_size[TX_MODES] = {
   TX_4X4,  // ONLY_4X4
   TX_8X8,  // ALLOW_8X8
diff --git a/vp9/common/vp9_common_data.h b/vp9/common/vp9_common_data.h
index f41962747221a13cb1073cec20b996e67954c947..a06c9bed81a8eb74d66b58e862920d5c068a7f81 100644
--- a/vp9/common/vp9_common_data.h
+++ b/vp9/common/vp9_common_data.h
@@ -29,6 +29,7 @@ extern const int num_pels_log2_lookup[BLOCK_SIZES];
 extern const PARTITION_TYPE partition_lookup[][BLOCK_SIZES];
 extern const BLOCK_SIZE subsize_lookup[PARTITION_TYPES][BLOCK_SIZES];
 extern const TX_SIZE max_txsize_lookup[BLOCK_SIZES];
+extern const BLOCK_SIZE txsize_to_bsize[TX_SIZES];
 extern const TX_SIZE tx_mode_to_biggest_tx_size[TX_MODES];
 extern const BLOCK_SIZE ss_size_lookup[BLOCK_SIZES][2][2];
 
diff --git a/vp9/encoder/vp9_pickmode.c b/vp9/encoder/vp9_pickmode.c
index 4b3f4f5a053fa6bcca340a29bac489a4007d981e..99f4897f42b837bbef13e8ae54f44c49173e7f45 100644
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -675,6 +675,7 @@ int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
     int i, j;
     const int width  = num_4x4_blocks_wide_lookup[bsize];
     const int height = num_4x4_blocks_high_lookup[bsize];
+    const BLOCK_SIZE bsize_tx = txsize_to_bsize[mbmi->tx_size];
 
     int rate2 = 0;
     int64_t dist2 = 0;
@@ -700,7 +701,7 @@ int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
                                   src_stride,
                                   &pd->dst.buf[4 * (j * dst_stride + i)],
                                   dst_stride, i, j, 0);
-          model_rd_for_sb_y(cpi, bsize, x, xd, &rate, &dist, &var_y, &sse_y);
+          model_rd_for_sb_y(cpi, bsize_tx, x, xd, &rate, &dist, &var_y, &sse_y);
           rate2 += rate;
           dist2 += dist;
           ++block_idx;