diff --git a/ap/build/uClibc/libcrypt/libcrypt.h b/ap/build/uClibc/libcrypt/libcrypt.h
new file mode 100644
index 0000000..67733d1
--- /dev/null
+++ b/ap/build/uClibc/libcrypt/libcrypt.h
@@ -0,0 +1,25 @@
+/* prototypes for internal crypt functions
+ *
+ * Copyright (C) 2000-2006 by Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef __LIBCRYPT_H__
+#define __LIBCRYPT_H__
+
+extern char *__md5_crypt(const unsigned char *pw, const unsigned char *salt) attribute_hidden;
+extern char *__sha256_crypt(const unsigned char *pw, const unsigned char *salt) attribute_hidden;
+extern char *__sha512_crypt(const unsigned char *pw, const unsigned char *salt) attribute_hidden;
+extern char *__des_crypt(const unsigned char *pw, const unsigned char *salt) attribute_hidden;
+
+extern char *__sha256_crypt_r (const char *key, const char *salt, char *buffer, int buflen) attribute_hidden;
+extern char *__sha512_crypt_r (const char *key, const char *salt, char *buffer, int buflen) attribute_hidden;
+
+/* shut up gcc-4.x signed warnings */
+#define strcpy(dst,src) strcpy((char*)dst,(char*)src)
+#define strlen(s) strlen((char*)s)
+#define strncat(dst,src,n) strncat((char*)dst,(char*)src,n)
+#define strncmp(s1,s2,n) strncmp((char*)s1,(char*)s2,n)
+
+#endif