diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index 46b3bdf..0db8fc8 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -164,6 +164,9 @@
     MBEDTLS_CIPHER_ARIA_128_CCM,         /**< Aria cipher with 128-bit key and CCM mode. */
     MBEDTLS_CIPHER_ARIA_192_CCM,         /**< Aria cipher with 192-bit key and CCM mode. */
     MBEDTLS_CIPHER_ARIA_256_CCM,         /**< Aria cipher with 256-bit key and CCM mode. */
+    MBEDTLS_CIPHER_AES_128_OFB,
+    MBEDTLS_CIPHER_AES_192_OFB,
+    MBEDTLS_CIPHER_AES_256_OFB
 } mbedtls_cipher_type_t;
 
 /** Supported cipher modes. */
diff --git a/include/mbedtls/cipher_internal.h b/include/mbedtls/cipher_internal.h
index 969ff9c..e761a9e 100644
--- a/include/mbedtls/cipher_internal.h
+++ b/include/mbedtls/cipher_internal.h
@@ -59,11 +59,20 @@
 
 #if defined(MBEDTLS_CIPHER_MODE_CFB)
     /** Encrypt using CFB (Full length) */
+
     int (*cfb_func)( void *ctx, mbedtls_operation_t mode, size_t length, size_t *iv_off,
                      unsigned char *iv, const unsigned char *input,
                      unsigned char *output );
 #endif
 
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+    /** Encrypt using OFB (Full length) */
+    int (*ofb_func)( void *ctx, size_t length, size_t *iv_off,
+                     unsigned char *iv,
+                     const unsigned char *input,
+                     unsigned char *output );
+#endif
+
 #if defined(MBEDTLS_CIPHER_MODE_CTR)
     /** Encrypt using CTR */
     int (*ctr_func)( void *ctx, size_t length, size_t *nc_off,