Index: xplot.h
--- xplot.h.orig
+++ xplot.h
@@ -59,8 +59,8 @@ double rint();     /* YMUL! some versions of ultrix om
 
 /* Coordinate type definitions */
 typedef union coord_u {
-  int i;
-  unsigned int u;
+  long i;
+  unsigned long u;
   struct timeval t;
   double d;
 } coord;