diff --git a/contrib/netbsd-tests/lib/libm/t_pow.c b/contrib/netbsd-tests/lib/libm/t_pow.c
index 62b7235e764..a8ae6f0f62f 100644
--- a/contrib/netbsd-tests/lib/libm/t_pow.c
+++ b/contrib/netbsd-tests/lib/libm/t_pow.c
@@ -34,6 +34,10 @@ __RCSID("$NetBSD: t_pow.c,v 1.3 2014/03/03 10:39:08 martin Exp $");
 #include <atf-c.h>
 #include <math.h>
 
+#ifdef __FreeBSD__
+#define isinff isinf
+#endif
+
 /*
  * pow(3)
  */