diff --git a/MaterialDesignLibrary/MaterialDesign/src/main/java/com/gc/materialdesign/views/CheckBox.java b/MaterialDesignLibrary/MaterialDesign/src/main/java/com/gc/materialdesign/views/CheckBox.java
index 27b41de..38c1a70 100644
--- a/MaterialDesignLibrary/MaterialDesign/src/main/java/com/gc/materialdesign/views/CheckBox.java
+++ b/MaterialDesignLibrary/MaterialDesign/src/main/java/com/gc/materialdesign/views/CheckBox.java
@@ -106,7 +106,8 @@ public void run() {
 
 	@Override
 	public void invalidate() {
-		checkView.invalidate();
+		if(null != checkView)
+			checkView.invalidate();
 		super.invalidate();
 	}