--- cups/filter/image-colorspace.c.orig	2007-06-27 11:00:47.000000000 +0200
+++ cups/filter/image-colorspace.c	2007-06-27 11:03:22.000000000 +0200
@@ -1143,7 +1143,7 @@
   x_xn = x / xn;
 
   if (x_xn > 0.008856)
-    return (cbrt(x_xn));
+    return (pow(x_xn, 1.0/3.0));
   else
     return (7.787 * x_xn + 16.0 / 116.0);
 }
@@ -1314,7 +1314,7 @@
   ciey_yn = ciey / D65_Y;
 
   if (ciey_yn > 0.008856)
-    ciel = 116 * cbrt(ciey_yn) - 16;
+    ciel = 116 * pow(ciey_yn, 1.0/3.0) - 16;
   else
     ciel = 903.3 * ciey_yn;