diff --git a/NSTimer+Blocks.m b/NSTimer+Blocks.m
index b7df0d8..cc106a5 100644
--- a/NSTimer+Blocks.m
+++ b/NSTimer+Blocks.m
@@ -13,7 +13,9 @@ +(id)scheduledTimerWithTimeInterval:(NSTimeInterval)inTimeInterval block:(void (
 {
     void (^block)() = [inBlock copy];
     id ret = [self scheduledTimerWithTimeInterval:inTimeInterval target:self selector:@selector(jdExecuteSimpleBlock:) userInfo:block repeats:inRepeats];
+#if !__has_feature(objc_arc)
     [block release];
+#endif
     return ret;
 }
 
@@ -21,7 +23,9 @@ +(id)timerWithTimeInterval:(NSTimeInterval)inTimeInterval block:(void (^)())inBl
 {
     void (^block)() = [inBlock copy];
     id ret = [self timerWithTimeInterval:inTimeInterval target:self selector:@selector(jdExecuteSimpleBlock:) userInfo:block repeats:inRepeats];
+#if !__has_feature(objc_arc)
     [block release];
+#endif
     return ret;
 }