diff --git a/legacy_tests/app_test_i2s_loopback/Makefile b/legacy_tests/app_test_i2s_loopback/Makefile
index c3e3ab40..51bec388 100644
--- a/legacy_tests/app_test_i2s_loopback/Makefile
+++ b/legacy_tests/app_test_i2s_loopback/Makefile
@@ -45,25 +45,25 @@ BUILD_FLAGS_i2s_slave_8in_8out_192khz = $(BUILD_FLAGS) \
   -D DEFAULT_FREQ=192000 -DCODEC_MASTER=1 \
   -O2 # optimisations to meet timing
 
-BUILD_FLAGS_tdm_master_8in_8out_48khz = $(BUILD_FLAGS) -D I2S_MODE_TDM=1 \
+BUILD_FLAGS_tdm_master_8in_8out_48khz = $(BUILD_FLAGS) -D XUA_PCM_FORMAT=XUA_PCM_FORMAT_TDM \
   -D ADAT_RX=0 -D ADAT_TX=0 -D SPDIF_RX=0 -D SPDIF_TX=0 -D MIDI=0 \
   -D NUM_USB_CHAN_IN=8 -D NUM_USB_CHAN_OUT=8 -D I2S_CHANS_ADC=8 -D I2S_CHANS_DAC=8 \
   -D DEFAULT_FREQ=48000 \
   -O2 # optimisations to meet timing
 
-BUILD_FLAGS_tdm_slave_8in_8out_48khz = $(BUILD_FLAGS) -D I2S_MODE_TDM=1 \
+BUILD_FLAGS_tdm_slave_8in_8out_48khz = $(BUILD_FLAGS) -D XUA_PCM_FORMAT=XUA_PCM_FORMAT_TDM \
   -D ADAT_RX=0 -D ADAT_TX=0 -D SPDIF_RX=0 -D SPDIF_TX=0 -D MIDI=0 \
   -D NUM_USB_CHAN_IN=8 -D NUM_USB_CHAN_OUT=8 -D I2S_CHANS_ADC=8 -D I2S_CHANS_DAC=8 \
   -D DEFAULT_FREQ=48000 -DCODEC_MASTER=1 \
   -O2 # optimisations to meet timing
 
-BUILD_FLAGS_tdm_master_16in_16out_48khz = $(BUILD_FLAGS) -D I2S_MODE_TDM=1 \
+BUILD_FLAGS_tdm_master_16in_16out_48khz = $(BUILD_FLAGS) -D XUA_PCM_FORMAT=XUA_PCM_FORMAT_TDM \
   -D ADAT_RX=0 -D ADAT_TX=0 -D SPDIF_RX=0 -D SPDIF_TX=0 -D MIDI=0 \
   -D NUM_USB_CHAN_IN=16 -D NUM_USB_CHAN_OUT=16 -D I2S_CHANS_ADC=16 -D I2S_CHANS_DAC=16 \
   -D DEFAULT_FREQ=48000 \
   -O2 # optimisations to meet timing
 
-BUILD_FLAGS_tdm_slave_16in_16out_48khz = $(BUILD_FLAGS) -D I2S_MODE_TDM=1 \
+BUILD_FLAGS_tdm_slave_16in_16out_48khz = $(BUILD_FLAGS) -D XUA_PCM_FORMAT=XUD_PCM_FORMAT_TDM \
   -D ADAT_RX=0 -D ADAT_TX=0 -D SPDIF_RX=0 -D SPDIF_TX=0 -D MIDI=0 \
   -D NUM_USB_CHAN_IN=16 -D NUM_USB_CHAN_OUT=16 -D I2S_CHANS_ADC=16 -D I2S_CHANS_DAC=16 \
   -D DEFAULT_FREQ=48000 -DCODEC_MASTER=1 \
diff --git a/legacy_tests/app_test_i2s_loopback/main.xc b/legacy_tests/app_test_i2s_loopback/main.xc
index bfef1fd1..a98bc9ec 100644
--- a/legacy_tests/app_test_i2s_loopback/main.xc
+++ b/legacy_tests/app_test_i2s_loopback/main.xc
@@ -203,7 +203,7 @@ void slave_mode_clk_setup(const unsigned samFreq, const unsigned chans_per_frame
 
 #endif
 
-#if I2S_MODE_TDM
+#if (XUA_PCM_FORMAT == XUA_PCM_FORMAT_TDM)
 const int i2s_tdm_mode = 8;
 #else
 const int i2s_tdm_mode = 2;