diff --git a/goprocam/GoProCamera.py b/goprocam/GoProCamera.py
index 5bceb3d..cf26b04 100644
--- a/goprocam/GoProCamera.py
+++ b/goprocam/GoProCamera.py
@@ -185,7 +185,7 @@ def whichCam(self):
 					self.power_on(self._mac_address)
 					time.sleep(5)
 			except timeout:
-				self.power_on(self.mac_address)
+				self.power_on(self._mac_address)
 				time.sleep(5)
 				response = urllib.request.urlopen('http://' + self.ip_addr + '/camera/cv',timeout=5).read()
 				if b"Hero3" in response: