diff --git a/iBeacon.h b/iBeacon.h
index a5a756c..e0ffb68 100644
--- a/iBeacon.h
+++ b/iBeacon.h
@@ -1,7 +1,7 @@
 #ifndef _I_BEACON_H_
 #define _I_BEACON_H_
 
-#if defined(NRF51) || !defined(__RFduino__)
+#if defined(NRF51) || defined(__RFduino__)
 
 #include "BLEPeripheral.h"