diff --git a/ros_arduino_msgs/CMakeLists.txt b/ros_arduino_msgs/CMakeLists.txt
index 16e7f81..bd6cfb3 100644
--- a/ros_arduino_msgs/CMakeLists.txt
+++ b/ros_arduino_msgs/CMakeLists.txt
@@ -15,7 +15,7 @@ add_service_files(FILES
                   DigitalWrite.srv
                   ServoRead.srv
                   ServoWrite.srv
-		  AnalogWrite.srv
+                  AnalogWrite.srv
                  )
 
 generate_messages(   
diff --git a/ros_arduino_python/nodes/arduino_node.py b/ros_arduino_python/nodes/arduino_node.py
index 4d52a1b..e379615 100755
--- a/ros_arduino_python/nodes/arduino_node.py
+++ b/ros_arduino_python/nodes/arduino_node.py
@@ -178,8 +178,8 @@ class ArduinoROS():
         return DigitalWriteResponse()
               
     def AnalogWriteHandler(self, req):
-	self.controller.analog_write(req.pin, req.value)
-	return AnalogWriteResponse()
+        self.controller.analog_write(req.pin, req.value)
+        return AnalogWriteResponse()
  
     def shutdown(self):
         # Stop the robot