diff --git a/bbb.go b/bbb.go
index <HASH>..<HASH> 100644
--- a/bbb.go
+++ b/bbb.go
@@ -238,17 +238,19 @@ func (p *bbbAnalogPin) Close() error {
 	return nil
 }
 
-// BBBPWMDefaultPolarity represents the default polarity (Positve or 1) for pwm.
-const BBBPWMDefaultPolarity = Positive
+const (
+	// BBBPWMDefaultPolarity represents the default polarity (Positve or 1) for pwm.
+	BBBPWMDefaultPolarity = Positive
 
-//	BBBPWMDefaultDuty represents the default duty (0ns) for pwm.
-const BBBPWMDefaultDuty = 0
+	// BBBPWMDefaultDuty represents the default duty (0ns) for pwm.
+	BBBPWMDefaultDuty = 0
 
-// BBBPWMDefaultPeriod represents the default period (500000ns) for pwm.
-const BBBPWMDefaultPeriod = 500000
+	// BBBPWMDefaultPeriod represents the default period (500000ns) for pwm.
+	BBBPWMDefaultPeriod = 500000
 
-// BBBPWMMaxPulseWidth represents the max period (1000000000ns) supported by pwm.
-const BBBPWMMaxPulseWidth = 1000000000
+	// BBBPWMMaxPulseWidth represents the max period (1000000000ns) supported by pwm.
+	BBBPWMMaxPulseWidth = 1000000000
+)
 
 type bbbPWMPin struct {
 	n string
doc: group the bbb constants together