diff --git a/crypto/ics/cryptfs.h b/crypto/ics/cryptfs.h
index eee43b3..8c80376 100644
--- a/crypto/ics/cryptfs.h
+++ b/crypto/ics/cryptfs.h
@@ -76,6 +76,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+  int cryptfs_check_footer(void);
   int cryptfs_check_passwd(const char *pw);
 #ifdef __cplusplus
 }