diff --git a/ssh-ed25519-sk.c b/ssh-ed25519-sk.c
index 89bf479dc..b6f28c09a 100644
--- a/ssh-ed25519-sk.c
+++ b/ssh-ed25519-sk.c
@@ -17,6 +17,8 @@
 
 /* #define DEBUG_SK 1 */
 
+#include "includes.h"
+
 #define SSHKEY_INTERNAL
 #include <sys/types.h>
 #include <limits.h>