diff --git a/ble_android.go b/ble_android.go
index c59daca..81f130a 100644
--- a/ble_android.go
+++ b/ble_android.go
@@ -326,7 +326,7 @@ func goOnDiscoverService(cid, cuuid *C.char, serv C.jobject) {
 }
 
 //export goOnDiscoverCharacteristic
-func goOnDiscoverCharacteristic(cid, csuuid *C.char, serv C.jobject, ccuuid *C.char, char C.jobject) {
+func goOnDiscoverCharacteristic(cid, csuuid *C.char, serv C.jobject, ccuuid *C.char, characteristic C.jobject) {
 	id := C.GoString(cid)
 	suuid := C.GoString(csuuid)
 	cuuid := C.GoString(ccuuid)
@@ -339,34 +339,34 @@ func goOnDiscoverCharacteristic(cid, csuuid *C.char, serv C.jobject, ccuuid *C.c
 		service: serv,
 	}
 
-	characteristic := Characteristic{
+	ch := Characteristic{
 		UUID: cuuid,
-		characteristic: char,
+		characteristic: characteristic,
 	}
 
 	gBLE.events <- DiscoverCharacteristicEvent{
 		Peripheral: peripheral,
 		Service: service,
-		Characteristic: characteristic,
+		Characteristic: ch,
 		Gatt: gatt.Characteristic{cuuid},
 	}
 }
 
 //export goOnCharacteristicChanged
-func goOnCharacteristicChanged(cid, ccuuid *C.char, char C.jobject, cvalue *C.char, length C.jint) {
+func goOnCharacteristicChanged(cid, ccuuid *C.char, characteristic C.jobject, cvalue *C.char, length C.jint) {
 	id := C.GoString(cid)
 	cuuid := C.GoString(ccuuid)
 
 	peripheral := gBLE.retrievePeripheral(id)
 
-	characteristic := Characteristic{
+	ch := Characteristic{
 		UUID: cuuid,
-		characteristic: char,
+		characteristic: characteristic,
 	}
 
 	gBLE.events <- UpdateValueEvent{
 		Peripheral: peripheral,
-		Characteristic: characteristic,
+		Characteristic: ch,
 		Data: C.GoBytes(unsafe.Pointer(cvalue), length),
 	}
 }