diff --git a/Cocoa Programming Guidelines.pdf b/Cocoa Programming Guidelines.pdf
index 8914ce9..ae8e2eb 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 1f761c0..fd741c4 100644
--- a/Cocoa Programming Guidelines.tex	
+++ b/Cocoa Programming Guidelines.tex	
@@ -648,7 +648,7 @@ When developing a class or a framework exceptions are thrown to indicate that cl
 
 \subsection{Lazy loading reduces memory footprint}
 
-Creating an object on demand reduces initialization  time of containing class.
+Creating an object on demand reduces initialisation time of a containing class. The following getter implementation is not thread safe, as two threads might try to initialise \inlinecode{\_cacheDictionary} at the same time.
 
 \begin{codelisting}
 - (NSMutableDictionary *)cacheDictionary