diff --git a/SoObjects/SOGo/NSString+Utilities.h b/SoObjects/SOGo/NSString+Utilities.h
index ef836fa16..409c3fe86 100644
--- a/SoObjects/SOGo/NSString+Utilities.h
+++ b/SoObjects/SOGo/NSString+Utilities.h
@@ -72,6 +72,7 @@
 
 - (int) timeValue;
 
+/* substrings */
 - (NSUInteger) countOccurrencesOfString: (NSString *) substring;