diff --git a/calendar/calendar.h b/calendar/calendar.h
index f854c69b7a..13aba56590 100644
--- a/calendar/calendar.h
+++ b/calendar/calendar.h
@@ -1,5 +1,5 @@
-#ifndef CALOBJ_H
-#define CALOBJ_H
+#ifndef CALENDAR_H
+#define CALENDAR_H
 
 BEGIN_GNOME_DECLS
 
diff --git a/calendar/gui/calendar.h b/calendar/gui/calendar.h
index f854c69b7a..13aba56590 100644
--- a/calendar/gui/calendar.h
+++ b/calendar/gui/calendar.h
@@ -1,5 +1,5 @@
-#ifndef CALOBJ_H
-#define CALOBJ_H
+#ifndef CALENDAR_H
+#define CALENDAR_H
 
 BEGIN_GNOME_DECLS