--- /dev/null
+#ifndef _COMPAT_CRYPTO_AES_H
+#define _COMPAT_CRYPTO_AES_H
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,24))
+#include_next <crypto/aes.h>
+#else
+
+#define AES_MIN_KEY_SIZE 16
+#define AES_MAX_KEY_SIZE 32
+#define AES_KEYSIZE_128 16
+#define AES_KEYSIZE_192 24
+#define AES_KEYSIZE_256 32
+#define AES_BLOCK_SIZE 16
+#define AES_MAX_KEYLENGTH (15 * 16)
+#define AES_MAX_KEYLENGTH_U32 (AES_MAX_KEYLENGTH / sizeof(u32))
+
+#endif /* (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,24)) */
+
+#endif