diff --git a/Packages/Interval_arithmetic/changes.txt b/Packages/Interval_arithmetic/changes.txt
index 7806f845a68..4a3e3d112a0 100644
--- a/Packages/Interval_arithmetic/changes.txt
+++ b/Packages/Interval_arithmetic/changes.txt
@@ -1,5 +1,8 @@
 Changes done to the Interval Arithmetic package.
 
+Version 4.40 on 17 February 2000
+- Added KCC/Sun support (by Stefan).
+
 Version 4.39 on 22 November 1999
 - Fix test-suite bug detected by CHECK_EXACTNESS (global intervals initilized
   with incorrect rounding mode).
diff --git a/Packages/Interval_arithmetic/include/CGAL/Interval_arithmetic/_FPU.h b/Packages/Interval_arithmetic/include/CGAL/Interval_arithmetic/_FPU.h
index dbf1c24484e..1a90e0a9579 100644
--- a/Packages/Interval_arithmetic/include/CGAL/Interval_arithmetic/_FPU.h
+++ b/Packages/Interval_arithmetic/include/CGAL/Interval_arithmetic/_FPU.h
@@ -71,7 +71,7 @@ inline double IA_force_to_double(const double x)
 
 #ifdef __linux__
 #include <fpu_control.h>
-#elif defined __SUNPRO_CC
+#elif defined __SUNPRO_CC || (defined __KCC && defined __sun)
 #include <ieeefp.h>
 #elif defined __osf || defined __osf__ || defined __BORLANDC__
 #include <float.h>
@@ -118,7 +118,7 @@ typedef fpu_control_t FPU_CW_t;
 #define CGAL_FE_UPWARD       (_FPU_RC_UP      | _FPU_DEFAULT)
 #define CGAL_FE_DOWNWARD     (_FPU_RC_DOWN    | _FPU_DEFAULT)
 
-#elif defined __SUNPRO_CC
+#elif defined __SUNPRO_CC || (defined __KCC && defined __sun)
 #define CGAL_IA_SETFPCW(CW) fpsetround(fp_rnd(CW))
 #define CGAL_IA_GETFPCW(CW) CW = fpgetround()
 typedef unsigned int FPU_CW_t;