--- examples/texture.c
+++ examples/texture.c
@@ -12,6 +12,7 @@
  */
 
 #include <math.h>
+#include <float.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "texture.h"
@@ -217,11 +218,11 @@
    niter ++;
    printf ("diffusion-reaction iteration %d \n", niter);
 
-   cpmax = -1.0e50;
-   cpmin = +1.0e50;
+   cpmax = -FLT_MAX;
+   cpmin = +FLT_MAX;
 
-   cmmax = -1.0e50;
-   cmmin = +1.0e50;
+   cmmax = -FLT_MAX;
+   cmmin = +FLT_MAX;
 
    if (reset) {
       niter = 0;