diff --git a/test/cfg/gnu.c b/test/cfg/gnu.c
index 2f2a447b8..6011ad44f 100644
--- a/test/cfg/gnu.c
+++ b/test/cfg/gnu.c
@@ -12,6 +12,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdarg.h>
+#include <netdb.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <pwd.h>