diff --git a/flashprog.8.tmpl b/flashprog.8.tmpl
index baa49b9..35738dc 100644
--- a/flashprog.8.tmpl
+++ b/flashprog.8.tmpl
@@ -1404,18 +1404,6 @@
 .B frequency
 is 12 MHz (12000 kHz) for the USB-8451 and 50 MHz (50000 kHz) for the USB-8452.
 The default is a frequency of 1 MHz (1000 kHz).
-.sp
-An optional
-.B cs
-parameter specifies which target chip select line should be used. Syntax is
-.sp
-.B "  flashprog \-p ni845x_spi:csnumber=value"
-.sp
-where
-.B value
-should be between
-.BR 0 " and " 7
-By default the CS0 is used.
 .SS
 .BR "digilent_spi " programmer
 .IP
diff --git a/ni845x_spi.c b/ni845x_spi.c
index a475598..98ac153 100644
--- a/ni845x_spi.c
+++ b/ni845x_spi.c
@@ -42,7 +42,6 @@
 
 static const struct spi_master spi_programmer_ni845x;
 
-static unsigned char CS_number;	// use chip select 0 as default
 static enum USB845x_type device_pid = Unknown_NI845X_Device;
 
 static uInt32 device_handle;
@@ -393,7 +392,6 @@
 static int ni845x_spi_init(struct flashprog_programmer *const prog)
 {
 	char *speed_str = NULL;
-	char *CS_str = NULL;
 	char *voltage = NULL;
 	char *endptr = NULL;
 	int requested_io_voltage_mV = 1200;     // default the IO voltage to 1.2V
@@ -402,17 +400,6 @@
 	char *ignore_io_voltage_limits_str = NULL;
 	int32 tmp = 0;
 
-	// read the cs parameter (which Chip select should we use)
-	CS_str = extract_programmer_param("cs");
-	if (CS_str) {
-		CS_number = CS_str[0] - '0';
-		free(CS_str);
-		if (strlen(CS_str) > 1 || CS_number < 0 || 7 < CS_number) {
-			msg_perr("Only CS 0-7 supported\n");
-			return 1;
-		}
-	}
-
 	voltage = extract_programmer_param("voltage");
 	if (voltage != NULL) {
 		requested_io_voltage_mV = parse_voltage(voltage);