diff --git a/include/mbedtls/ecp_internal.h b/include/mbedtls/ecp_internal.h
new file mode 100644
index 0000000..835b0cc
--- /dev/null
+++ b/include/mbedtls/ecp_internal.h
@@ -0,0 +1,84 @@
+/**
+ * \file ecp_internal.h
+ *
+ * \brief Function declarations for alternative implementation of elliptic curve
+ * point arithmetic.
+ *
+ *  Copyright (C) 2016, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_ECP_FUNCTION_ALT_H
+#define MBEDTLS_ECP_FUNCTION_ALT_H
+
+
+#if defined(MBEDTLS_ECP_FUNCTION_ALT)
+
+unsigned char ecp_alt_grp_capable( const mbedtls_ecp_group *grp );
+
+#if defined(MBEDTLS_ECP_ALT_INIT)
+int  ecp_alt_init( const mbedtls_ecp_group *grp );
+#endif
+
+#if defined(MBEDTLS_ECP_ALT_DEINIT)
+void ecp_alt_deinit( const mbedtls_ecp_group *grp );
+
+#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT)
+int ecp_randomize_jac_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *pt,
+                           int (*f_rng)(void *, unsigned char *, size_t),
+                           void *p_rng );
+#endif
+
+#if defined(MBEDTLS_ECP_ADD_MIXED_ALT)
+int ecp_add_mixed_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
+                       const mbedtls_ecp_point *P, const mbedtls_ecp_point *Q );
+#endif
+
+#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT)
+int ecp_double_jac_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
+                        const mbedtls_ecp_point *P );
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT)
+int ecp_normalize_jac_many_alt( const mbedtls_ecp_group *grp,
+                                mbedtls_ecp_point *T[], size_t t_len );
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT)
+int ecp_normalize_jac_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *pt );
+#endif
+
+#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT)
+int ecp_double_add_mxz_alt( const mbedtls_ecp_group *grp,
+                            mbedtls_ecp_point *R, mbedtls_ecp_point *S,
+                            const mbedtls_ecp_point *P,
+                            const mbedtls_ecp_point *Q, const mbedtls_mpi *d );
+#endif
+
+#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT)
+int ecp_randomize_mxz_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *P,
+                           int (*f_rng)(void *, unsigned char *, size_t), 
+                           void *p_rng );
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT)
+int ecp_normalize_mxz_alt( const mbedtls_ecp_group *grp, mbedtls_ecp_point *P );
+#endif
+
+#endif /* MBEDTLS_ECP_FUNCTION_ALT */
+
+#endif /* ecp_function_alt.h */
+