diff --git a/lib/ack/libp/exp.c b/lib/ack/libp/exp.c
index f1f78498a..647ea5203 100755
--- a/lib/ack/libp/exp.c
+++ b/lib/ack/libp/exp.c
@@ -19,7 +19,7 @@ extern	_trp();
 #define M_DMINEXP DBL_MIN_EXP
 #endif
 #undef HUGE
-#define HUGE	1e1000
+#define HUGE	HUGE_VAL
 
 static double
 Ldexp(fl,exp)
diff --git a/lib/ack/libp/log.c b/lib/ack/libp/log.c
index d5ba0e4e1..0f164fcbd 100755
--- a/lib/ack/libp/log.c
+++ b/lib/ack/libp/log.c
@@ -16,7 +16,7 @@
 #include <float.h>
 #endif
 #undef HUGE
-#define HUGE	1e1000
+#define HUGE	HUGE_VAL
 
 double
 _log(x)