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src/grid.c

@@ -2104,7 +2104,8 @@ static void grid_check_cyclic(GRID *gridptr)
 	{
 	  xinc = xvals[1] - xvals[0];
 	  x0 = 2*xvals[xsize-1]-xvals[xsize-2]-360;
-	  if ( DBL_IS_EQUAL(x0, xvals[0]) ) gridptr->isCyclic = TRUE;
+	  if ( ! DBL_IS_EQUAL(xvals[0], xvals[xsize-1]) )
+	    if ( DBL_IS_EQUAL(x0, xvals[0]) ) gridptr->isCyclic = TRUE;
 	}
     }
   else if ( gridptr->type == GRID_CURVILINEAR )