diff --git a/SVPullToRefresh/UIScrollView+SVPullToRefresh.h b/SVPullToRefresh/UIScrollView+SVPullToRefresh.h
index d2c482b..06a5546 100644
--- a/SVPullToRefresh/UIScrollView+SVPullToRefresh.h
+++ b/SVPullToRefresh/UIScrollView+SVPullToRefresh.h
@@ -47,7 +47,7 @@ typedef NSUInteger SVPullToRefreshState;
 @property (nonatomic, strong) UIColor *textColor;
 @property (nonatomic, strong, readonly) UILabel *titleLabel;
 @property (nonatomic, strong, readonly) UILabel *subtitleLabel;
-@property (nonatomic, strong) UIColor *activityIndicatorViewColor;
+@property (nonatomic, strong, readwrite) UIColor *activityIndicatorViewColor NS_AVAILABLE_IOS(5_0);
 @property (nonatomic, readwrite) UIActivityIndicatorViewStyle activityIndicatorViewStyle;
 
 @property (nonatomic, readonly) SVPullToRefreshState state;