--- lib/PTL/include/Bitset.h.gmp	2010-02-10 06:58:42.000000000 +0100
+++ lib/PTL/include/Bitset.h	2010-02-10 07:01:57.000000000 +0100
@@ -50,12 +50,14 @@
    int cur;
 
    static const int bits_per_limb
-#if __GNU_MP_VERSION >= 4
+#if __GNU_MP_VERSION == 4
 #if __GNU_MP_VERSION_MINOR > 0
      =GMP_NUMB_BITS
 #else
      =__GMP_BITS_PER_MP_LIMB
 #endif
+#elif __GNU_MP_VERSION >= 5
+     =GMP_LIMB_BITS
 #endif
    ;