diff --git a/HTMLKit/HTMLCharacterToken.h b/HTMLKit/HTMLCharacterToken.h
index f03dc58..ce61a9f 100644
--- a/HTMLKit/HTMLCharacterToken.h
+++ b/HTMLKit/HTMLCharacterToken.h
@@ -18,4 +18,5 @@
 - (void)appendString:(NSString *)string;
 
 - (BOOL)isWhitespaceToken;
+
 @end
diff --git a/HTMLKit/HTMLCharacterToken.m b/HTMLKit/HTMLCharacterToken.m
index 9ed26f6..035c627 100644
--- a/HTMLKit/HTMLCharacterToken.m
+++ b/HTMLKit/HTMLCharacterToken.m
@@ -35,6 +35,7 @@
 
 - (BOOL)isWhitespaceToken
 {
+#warning Cache Character Set
 	NSCharacterSet *set = [[NSCharacterSet characterSetWithCharactersInString:@" \t\n\f"] invertedSet];
 	return [_characters rangeOfCharacterFromSet:set].location == NSNotFound;
 }