diff --git a/xpath.c b/xpath.c
index 89fab588..bd093643 100644
--- a/xpath.c
+++ b/xpath.c
@@ -527,9 +527,9 @@ xmlXPathIsInf(double val) {
 #ifdef isinf
     return isinf(val) ? (val > 0 ? 1 : -1) : 0;
 #else
-    if (val >= HUGE_VAL)
+    if (val >= INFINITY)
         return 1;
-    if (val <= -HUGE_VAL)
+    if (val <= -INFINITY)
         return -1;
     return 0;
 #endif