diff --git a/SOPE/NGCards/iCalByDayMask.h b/SOPE/NGCards/iCalByDayMask.h
index be08e0d9a..f5a1e11bb 100644
--- a/SOPE/NGCards/iCalByDayMask.h
+++ b/SOPE/NGCards/iCalByDayMask.h
@@ -53,8 +53,8 @@ typedef iCalWeekOccurrence iCalWeekOccurrences[7];
 - (id) initWithDays: (iCalWeekOccurrences) theDays;
 + (id) byDayMaskWithRuleString: (NSString *) byDayRule;
 - (id) initWithRuleString: (NSString *) byDayRule;
-+ (id) byDayMaskWithDaysAndOccurences: (NSArray *) values;
-- (id) initWithDaysAndOccurences: (NSArray *) values;
++ (id) byDayMaskWithDaysAndOccurrences: (NSArray *) values;
+- (id) initWithDaysAndOccurrences: (NSArray *) values;
 
 - (BOOL) occursOnDay: (iCalWeekDay) weekDay;
 - (BOOL) occursOnDay: (iCalWeekDay) weekDay
diff --git a/SOPE/NGCards/iCalByDayMask.m b/SOPE/NGCards/iCalByDayMask.m
index 643b37b44..fd3fbf022 100644
--- a/SOPE/NGCards/iCalByDayMask.m
+++ b/SOPE/NGCards/iCalByDayMask.m
@@ -190,17 +190,17 @@
   return self;
 }
 
-+ (id) byDayMaskWithDaysAndOccurences: (NSArray *) values
++ (id) byDayMaskWithDaysAndOccurrences: (NSArray *) values
 {
   id o;
 
-  o = [[self alloc] initWithDaysAndOccurences: values];
+  o = [[self alloc] initWithDaysAndOccurrences: values];
   AUTORELEASE(o);
 
   return o;
 }
 
-- (id) initWithDaysAndOccurences: (NSArray *) values
+- (id) initWithDaysAndOccurrences: (NSArray *) values
 {
   unsigned int count, max;
   NSString *value;
@@ -258,7 +258,7 @@
 
               if (day != iCalWeekDayUnknown)
                 {
-                  value = [mask objectForKey: @"occurence"];
+                  value = [mask objectForKey: @"occurrence"];
                   valueLength = [value length];
                   if (valueLength > 0)
                     {
diff --git a/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m b/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
index 66753eae1..dd08d262c 100644
--- a/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
+++ b/SoObjects/Appointments/iCalRepeatableEntityObject+SOGo.m
@@ -197,7 +197,7 @@
 
               o = [repeat objectForKey: @"days"];
               if ([o isKindOfClass: [NSArray class]])
-                [rule setByDayMask: [iCalByDayMask byDayMaskWithDaysAndOccurences: o]];
+                [rule setByDayMask: [iCalByDayMask byDayMaskWithDaysAndOccurrences: o]];
 
               o = [repeat objectForKey: @"monthdays"];
               if ([o isKindOfClass: [NSArray class]])