diff --git a/gpio/gpio.c b/gpio/gpio.c
index 3fc97a3..1186a65 100644
--- a/gpio/gpio.c
+++ b/gpio/gpio.c
@@ -71,18 +71,18 @@ char *usage = "Usage: gpio -v\n"
               "       gpio [-p] <read/write/wb> ...\n"
               "       gpio <mode/read/write/aread/awritewb/pwm/pwmTone/clock> ...\n"
               "       gpio <toggle/blink> <pin>\n"
-	      "       gpio readall\n"
-	      "       gpio wfi <pin> <mode>\n"
-	      "       gpio drive <group> <value>\n"
-	      "       gpio pwm-bal/pwm-ms \n"
-	      "       gpio pwmr <range> \n"
-	      "       gpio pwmc <divider> \n"
-	      "       gpio i2cd/i2cdetect\n"
-	      "       gpio rbx/rbd\n"
-	      "       gpio wb <value>\n"
-	      "       gpio usbp high/low\n"
-	      "       gpio gbr <channel>\n"
-	      "       gpio gbw <channel> <value>" ;	// No trailing newline needed here.
+              "       gpio readall\n"
+              "       gpio wfi <pin> <mode>\n"
+              "       gpio drive <group> <value>\n"
+              "       gpio pwm-bal/pwm-ms \n"
+              "       gpio pwmr <range> \n"
+              "       gpio pwmc <divider> \n"
+              "       gpio i2cd/i2cdetect\n"
+              "       gpio rbx/rbd\n"
+              "       gpio wb <value>\n"
+              "       gpio usbp high/low\n"
+              "       gpio gbr <channel>\n"
+              "       gpio gbw <channel> <value>" ;	// No trailing newline needed here.
 
 
 #ifdef	NOT_FOR_NOW