diff --git a/source/Lib/CommonLib/Rom.cpp b/source/Lib/CommonLib/Rom.cpp
index 04bd24ce6c6a0524ad95a698b78fbac59defc845..aadd7d88d95c41a86fef393ac7acfbbc5b7fdd99 100644
--- a/source/Lib/CommonLib/Rom.cpp
+++ b/source/Lib/CommonLib/Rom.cpp
@@ -597,7 +597,11 @@ const int g_invQuantScales[SCALING_LIST_REM_NUM] =
 //structures
 //EMT transform sets
 const int g_aiTrSubsetIntra[3][2] = { { DST7, DCT8 }, { DST7, DCT8 }, { DST7, DCT8 } };
+#if JVET_L0118_ALIGN_MTS_INDEX
+const int g_aiTrSubsetInter[2] = { DST7, DCT8 };
+#else
 const int g_aiTrSubsetInter[4] = { DCT8, DST7 };
+#endif
 
 const uint8_t g_aucTrSetVert[NUM_INTRA_MODE - 1] =
 {//0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
diff --git a/source/Lib/CommonLib/Rom.h b/source/Lib/CommonLib/Rom.h
index ce3a6554ad7c93d5befd599a71527d1126e47e9e..ba99b1608285405bd837b834e17481f9adc61fc5 100644
--- a/source/Lib/CommonLib/Rom.h
+++ b/source/Lib/CommonLib/Rom.h
@@ -118,7 +118,11 @@ extern const TMatrixCoeff g_as_DST_MAT_4 [TRANSFORM_NUMBER_OF_DIRECTIONS][4][4];
 #endif
 
 extern const int g_aiTrSubsetIntra[3][2];
+#if JVET_L0118_ALIGN_MTS_INDEX
+extern const int g_aiTrSubsetInter[2];
+#else
 extern const int g_aiTrSubsetInter[4];
+#endif
 
 extern const uint8_t g_aucTrSetVert[NUM_INTRA_MODE - 1];
 extern const uint8_t g_aucTrSetHorz[NUM_INTRA_MODE - 1];
diff --git a/source/Lib/CommonLib/TypeDef.h b/source/Lib/CommonLib/TypeDef.h
index eede39cb4307f248d5e1546fd3f8495236503f78..61f67ef29d25ce1c5ee3b17a31e736b9ce3fd852 100644
--- a/source/Lib/CommonLib/TypeDef.h
+++ b/source/Lib/CommonLib/TypeDef.h
@@ -50,6 +50,8 @@
 #include <assert.h>
 #include <cassert>
 
+#define JVET_L0118_ALIGN_MTS_INDEX                        1 // Align mts_index on intra and inter
+
 #define JVET_L0377_AMVR_ROUNDING_ALIGN                    1 // Align AMVR rounding for AMVP candidate
 
 #define JVET_L0285_8BIT_TRANSFORM_CORE                    1 // Primary transform using 8-bit cores