diff --git a/Cocoa Programming Guidelines.pdf b/Cocoa Programming Guidelines.pdf
index 07c11f5..5fc88ce 100644
Binary files a/Cocoa Programming Guidelines.pdf and b/Cocoa Programming Guidelines.pdf differ
diff --git a/Cocoa Programming Guidelines.tex b/Cocoa Programming Guidelines.tex
index e697594..b1acec1 100644
--- a/Cocoa Programming Guidelines.tex	
+++ b/Cocoa Programming Guidelines.tex	
@@ -204,8 +204,8 @@ Please pay attention to the linespacing, it is also a rule.
 
 
 typedef NS_ENUM(NSInteger, Enumeration) {
-    EnumerationInvalid,
     EnumerationA,
+    EnumerationB
 };
 
 extern CGFloat const ExampleClassDefaultHeight;
@@ -663,7 +663,6 @@ A custom error have both the error domain and error code defined.
 extern NSString *const MyErrorDomain;
 
 typedef NS_ENUM(NSInteger, MyErrorCode) {
-    MyInvalidErrorCode
     MyErrorCode1,
     MyErrorCode2,
     MyUnknownErrorCode,