diff --git a/source/c_softpwm.c b/source/c_softpwm.c
index ee710f3..bd81d86 100644
--- a/source/c_softpwm.c
+++ b/source/c_softpwm.c
@@ -201,7 +201,7 @@ void *softpwm_thread_toggle(void *key)
       if (duty_local != 0)
       {
         /* Set gpio */
-        if (polarity_local)
+        if (!polarity_local)
           gpio_set_value(gpio, HIGH);
         else
           gpio_set_value(gpio, LOW);
@@ -213,7 +213,7 @@ void *softpwm_thread_toggle(void *key)
       if (duty_local != 100)
       {
         /* Unset gpio */
-        if (polarity_local)
+        if (!polarity_local)
           gpio_set_value(gpio, LOW);
         else
           gpio_set_value(gpio, HIGH);
@@ -223,7 +223,7 @@ void *softpwm_thread_toggle(void *key)
     }
   }
 
-  if (polarity_local)
+  if (!polarity_local)
     gpio_set_value(gpio, LOW);
   else
     gpio_set_value(gpio, HIGH);
diff --git a/source/py_softpwm.c b/source/py_softpwm.c
index 701cff0..acb3296 100644
--- a/source/py_softpwm.c
+++ b/source/py_softpwm.c
@@ -50,7 +50,7 @@ static PyObject *py_start_channel(PyObject *self, PyObject *args, PyObject *kwar
     char *channel;
     float frequency = 2000.0;
     float duty_cycle = 0.0;
-    int polarity = 1;
+    int polarity = 0;
     static char *kwlist[] = {"channel", "duty_cycle", "frequency", "polarity", NULL};
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|ffi", kwlist, &channel, &duty_cycle, &frequency, &polarity)) {