diff --git a/include/polarssl/ecp.h b/include/polarssl/ecp.h
index e6f28e6..7bd9bd5 100644
--- a/include/polarssl/ecp.h
+++ b/include/polarssl/ecp.h
@@ -95,18 +95,12 @@
  * \brief           ECP key pair structure
  *
  * A generic key pair that could be used for ECDSA, fixed ECDH, etc.
- * Usage can be restricted to a particular algorithm by the 'alg' field,
- * see POLARSSL_ECP_KEY_ALG_* constants (default: unrestricted).
- *
- * \sa ecdh_context
- * \sa ecdsa_context
  */
 typedef struct
 {
     ecp_group grp;      /*!<  Elliptic curve and base point     */
     mpi d;              /*!<  our secret value                  */
     ecp_point Q;        /*!<  our public value                  */
-    int alg;            /*!<  algorithm to use this key with    */
 }
 ecp_keypair;
 
@@ -160,12 +154,6 @@
  */
 #define POLARSSL_ECP_TLS_NAMED_CURVE    3   /**< ECCurveType's named_curve */
 
-/*
- * Algorithm identifiers from RFC 5480 for use with EC keys
- */
-#define POLARSSL_ECP_KEY_ALG_UNRESTRICTED   0   /**< RFC 5480 2.1.1 */
-#define POLARSSL_ECP_KEY_ALG_ECDH           1   /**< RFC 5480 2.1.2 */
-
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/library/ecp.c b/library/ecp.c
index 9e7a967..1468312 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -101,7 +101,6 @@
     ecp_group_init( &key->grp );
     mpi_init( &key->d );
     ecp_point_init( &key->Q );
-    key->alg = POLARSSL_ECP_KEY_ALG_UNRESTRICTED;
 }
 
 /*
@@ -142,7 +141,6 @@
     ecp_group_free( &key->grp );
     mpi_free( &key->d );
     ecp_point_free( &key->Q );
-    key->alg = POLARSSL_ECP_KEY_ALG_UNRESTRICTED;
 }
 
 /*
diff --git a/library/x509parse.c b/library/x509parse.c
index 1dca19d..4fba038 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -590,9 +590,6 @@
             break;
 
         case POLARSSL_PK_ECKEY_DH:
-            ((ecp_keypair *) pk->data)->alg = POLARSSL_ECP_KEY_ALG_ECDH;
-            /* FALLTHROUGH */
-
         case POLARSSL_PK_ECKEY:
             ret = x509_use_ecparams( &alg_params, &pk_ec( *pk )->grp ) ||
                   x509_get_ecpubkey( p, end, pk->data );
@@ -2385,9 +2382,6 @@
 
     if( pk_alg == POLARSSL_PK_ECKEY || pk_alg == POLARSSL_PK_ECKEY_DH )
     {
-        if( pk_alg == POLARSSL_PK_ECKEY_DH )
-            pk_ec( *pk )->alg = POLARSSL_ECP_KEY_ALG_ECDH;
-
         if( ( ret = x509_use_ecparams( &params, &pk_ec( *pk )->grp ) ) != 0 ||
             ( ret = x509parse_key_sec1_der( pk_ec( *pk ), p, len )  ) != 0 )
         {