diff --git a/kexecdh.c b/kexecdh.c
index bcfa3b107..efb2e55a6 100644
--- a/kexecdh.c
+++ b/kexecdh.c
@@ -211,6 +211,8 @@ kex_ecdh_dec(struct kex *kex, const struct sshbuf *server_blob,
 
 #else
 
+#include "ssherr.h"
+
 struct kex;
 struct sshbuf;
 struct sshkey;