diff --git a/wiringPi/softPwm.c b/wiringPi/softPwm.c
index 56bf4d8..b568dfb 100644
--- a/wiringPi/softPwm.c
+++ b/wiringPi/softPwm.c
@@ -84,8 +84,22 @@ static PI_THREAD (softPwmThread)
   return NULL ;
 }
 
+
+/*
+ * softPwmWrite:
+ *	Write a PWM value to the given pin
+ *********************************************************************************
+ */
+
 void softPwmWrite (int pin, int value)
 {
+  pin &= 63 ;
+
+  /**/ if (value < 0)
+    value = 0 ;
+  else if (value > range [pin])
+    value = range [pin] ;
+
   marks [pin] = value ;
 }
 
diff --git a/wiringPi/softPwm.h b/wiringPi/softPwm.h
index a6d8cd4..4a17cb0 100644
--- a/wiringPi/softPwm.h
+++ b/wiringPi/softPwm.h
@@ -22,6 +22,5 @@
  ***********************************************************************
  */
 
-extern int  setupSoftPwm (int pin) ;
-extern int softPwmCreate (int pin, int value, int range) ;
-extern void softPwmWrite (int pin, int value) ;
+extern int  softPwmCreate (int pin, int value, int range) ;
+extern void softPwmWrite  (int pin, int value) ;