diff --git a/regress/netcat.c b/regress/netcat.c
index 08e642bc0..fe94dd908 100644
--- a/regress/netcat.c
+++ b/regress/netcat.c
@@ -64,7 +64,7 @@
 #ifdef HAVE_ERR_H
 # include <err.h>
 #endif
-#ifndef HAVE_SYS_BYTEORDER_H
+#ifdef HAVE_SYS_BYTEORDER_H
 # include <sys/byteorder.h>
 #endif