--- a/calendar.h
+++ b/calendar.h
@@ -1,4 +1,4 @@
-#include <ical.h>
+#include <libical/ical.h>
 #include <stdlib.h>
 #include <gtk/gtk.h>
 #include <string.h>
--- a/calendarfunc.h
+++ b/calendarfunc.h
@@ -22,7 +22,7 @@
 
 #include <unistd.h>
 #include <stdlib.h>
-#include <ical.h>
+#include <libical/ical.h>
 #define TIMZ 3.0
 #define MINAGE 13.5
 #define SUNSET 19.5 /*approximate */