diff --git a/library/x509parse.c b/library/x509parse.c
index dcb8ea9..9b68af4 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -42,6 +42,8 @@
 #include "polarssl/md4.h"
 #include "polarssl/md5.h"
 #include "polarssl/sha1.h"
+#include "polarssl/sha2.h"
+#include "polarssl/sha4.h"
 
 #include <string.h>
 #include <stdlib.h>