diff --git a/contrib/netbsd-tests/lib/libm/t_pow.c b/contrib/netbsd-tests/lib/libm/t_pow.c
index ee513db27ddb..fbdb9845363e 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 1.4 2015/09/08 05:24:27 dholland Exp $");
 #include <atf-c.h>
 #include <math.h>
 
+#ifdef __FreeBSD__
+#define isinff isinf
+#endif
+
 /*
  * pow(3)
  */