diff --git a/armsrc/em4x50.c b/armsrc/em4x50.c
index ddc297591..93da6425f 100644
--- a/armsrc/em4x50.c
+++ b/armsrc/em4x50.c
@@ -192,7 +192,7 @@ static void em4x50_setup_read(void) {
     // 50ms for the resonant antenna to settle.
     SpinDelay(50);
     // Now set up the SSC to get the ADC samples that are now streaming at us.
-    FpgaSetupSsc();
+    FpgaSetupSsc(FPGA_MAJOR_MODE_LF_READER);
     // start a 1.5ticks is 1us
     StartTicks();
  
diff --git a/armsrc/lfadc.c b/armsrc/lfadc.c
index 8c453bdc9..2c46f5581 100644
--- a/armsrc/lfadc.c
+++ b/armsrc/lfadc.c
@@ -181,7 +181,7 @@ void lf_init(bool reader, bool simulate) {
     SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
     // Now set up the SSC to get the ADC samples that are now streaming at us.
-    FpgaSetupSsc();
+    FpgaSetupSsc(FPGA_MAJOR_MODE_LF_READER);
 
     // When in reader mode, give the field a bit of time to settle.
     // 313T0 = 313 * 8us = 2504us = 2.5ms  Hitag2 tags needs to be fully powered.
diff --git a/armsrc/thinfilm.c b/armsrc/thinfilm.c
index a77a70744..16c91c8bf 100644
--- a/armsrc/thinfilm.c
+++ b/armsrc/thinfilm.c
@@ -122,7 +122,7 @@ void SimulateThinFilm(uint8_t *data, size_t len) {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
     // Set up the synchronous serial port
-    FpgaSetupSsc();
+    FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
 
     // connect Demodulated Signal to ADC:
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);