--- ./src/celmath/mathlib.h.ori	2012-04-28 11:46:28.817870413 +0200
+++ ./src/celmath/mathlib.h.ori	2012-04-28 11:46:43.447435337 +0200
@@ -10,6 +10,7 @@ 
 #ifndef _CELMATH_MATHLIB_H_
 #define _CELMATH_MATHLIB_H_
 
+#include <unistd.h>
 #include <cmath>
 #include <stdlib.h>
 
--- ./src/celmath/intersect.h.ori	2012-04-28 11:42:48.735371894 +0200
+++ ./src/celmath/intersect.h.ori	2012-04-28 11:50:33.078302572 +0200
@@ -12,6 +12,8 @@ 
 #ifndef _CELMATH_INTERSECT_H_
 #define _CELMATH_INTERSECT_H_
 
+#include "mathlib.h"
+
 #include "ray.h"
 #include "sphere.h"
 #include "ellipsoid.h"
--- ./src/celestia/kde/kdeapp.cpp.ori	2012-04-28 11:52:50.638614485 +0200
+++ ./src/celestia/kde/kdeapp.cpp.ori	2012-04-28 11:53:15.815586699 +0200
@@ -17,6 +17,7 @@ 
 
 
 #include <libintl.h>
+#include <unistd.h>
 #include <fstream>
 #include <sstream>