diff --git a/EFCircularSlider/EFCircularSlider.m b/EFCircularSlider/EFCircularSlider.m
index f59795f..adf5bf3 100644
--- a/EFCircularSlider/EFCircularSlider.m
+++ b/EFCircularSlider/EFCircularSlider.m
@@ -59,6 +59,14 @@ - (id)initWithRadius:(CGFloat)radius
     return self;
 }
 
+-(id)initWithCoder:(NSCoder *)aDecoder
+{
+  if((self = [super initWithCoder:aDecoder])) {
+    [self initDefaultValuesWithRadius:kFitFrameRadius];
+  }
+  return self;
+}
+
 -(void) initDefaultValuesWithRadius:(CGFloat)radius
 {
     _radius        = radius;