diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index 86f144cfe..08a386634 100644
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -126,7 +126,7 @@ void FpgaSetupSsc(void) {
 		GPIO_SSC_CLK;
 	AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
 
-	AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_SSC);
+	AT91C_BASE_PMC->PMC_PCER |= (1 << AT91C_ID_SSC);
 
 	// Now set up the SSC proper, starting from a known state.
 	AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
diff --git a/armsrc/fpgaloader.h b/armsrc/fpgaloader.h
index 5c0f802e4..5e5e6af65 100644
--- a/armsrc/fpgaloader.h
+++ b/armsrc/fpgaloader.h
@@ -59,11 +59,11 @@ void SetAdcMuxFor(uint32_t whichGpio);
 #define FPGA_HF_READER_RX_XCORR_SNOOP				(1<<1)
 #define FPGA_HF_READER_RX_XCORR_QUARTER_FREQ		(1<<2)
 // Options for the HF simulated tag, how to modulate
-#define FPGA_HF_SIMULATOR_NO_MODULATION				(0<<0)
-#define FPGA_HF_SIMULATOR_MODULATE_BPSK				(1<<0)
-#define FPGA_HF_SIMULATOR_MODULATE_212K				(2<<0)
-#define FPGA_HF_SIMULATOR_MODULATE_424K				(4<<0)
-#define FPGA_HF_SIMULATOR_MODULATE_424K_8BIT		0x5//101
+#define FPGA_HF_SIMULATOR_NO_MODULATION				(0<<0) // 0000
+#define FPGA_HF_SIMULATOR_MODULATE_BPSK				(1<<0) // 0001
+#define FPGA_HF_SIMULATOR_MODULATE_212K				(2<<0) // 0010
+#define FPGA_HF_SIMULATOR_MODULATE_424K				(4<<0) // 0100
+#define FPGA_HF_SIMULATOR_MODULATE_424K_8BIT		0x5    // 0101
 //  no 848K 
 
 // Options for ISO14443A