diff --git a/iCadeTest/iCade/iCadeReaderView.m b/iCadeTest/iCade/iCadeReaderView.m
index 019b70c..e2e70c8 100644
--- a/iCadeTest/iCade/iCadeReaderView.m
+++ b/iCadeTest/iCade/iCadeReaderView.m
@@ -40,14 +40,16 @@ - (id)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     inputView = [[UIView alloc] initWithFrame:CGRectZero];
     
-    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didEnterBackground) name:UIApplicationDidEnterBackgroundNotification object:nil];
+	if (&UIApplicationDidEnterBackgroundNotification)
+	    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didEnterBackground) name:UIApplicationDidEnterBackgroundNotification object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didBecomeActive) name:UIApplicationDidBecomeActiveNotification object:nil];
     
     return self;
 }
 
 - (void)dealloc {
-    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];
+	if (&UIApplicationDidEnterBackgroundNotification)
+	    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];
     [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidBecomeActiveNotification object:nil];
     [super dealloc];
 }