diff --git a/src/fido/oath.c b/src/fido/oath.c
index 40e72a2..c9ebd2d 100644
--- a/src/fido/oath.c
+++ b/src/fido/oath.c
@@ -24,6 +24,7 @@
 #include "asn1.h"
 #include "crypto_utils.h"
 #include "management.h"
+#include "ctap_hid.h"
 
 #define MAX_OATH_CRED   255
 #define CHALLENGE_LEN   8