--- types.h.org	Wed May 13 02:48:25 1998
+++ types.h	Sun Aug  9 13:27:34 1998
@@ -8,8 +8,9 @@
 
 #ifdef PI
 #undef PI
+#endif /* PI */
 #define         PI                      3.14159265358979
-#endif
+/* #endif */
 #define         PI4                     PI/4
 #define         PI64                    PI/64
 #define SQRT2       1.41421356237
