diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index 6208c42..e4ab5e1 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -1016,7 +1016,7 @@
  * Caller:  library/ecdh.c
  *          library/ecdsa.c
  *
- * Requires: POLARSSL_BIGNUM_C
+ * Requires: POLARSSL_BIGNUM_C and at least one POLARSSL_ECP_DP_XXX_ENABLED
  */
 #define POLARSSL_ECP_C
 
@@ -1710,7 +1710,15 @@
 #error "POLARSSL_ECDSA_C defined, but not all prerequisites"
 #endif
 
-#if defined(POLARSSL_ECP_C) && !defined(POLARSSL_BIGNUM_C)
+#if defined(POLARSSL_ECP_C) && !defined(POLARSSL_BIGNUM_C) || ( \
+    !defined(POLARSSL_ECP_DP_SECP192R1_ENABLED) &&              \
+    !defined(POLARSSL_ECP_DP_SECP224R1_ENABLED) &&              \
+    !defined(POLARSSL_ECP_DP_SECP256R1_ENABLED) &&              \
+    !defined(POLARSSL_ECP_DP_SECP384R1_ENABLED) &&              \
+    !defined(POLARSSL_ECP_DP_SECP521R1_ENABLED) &&              \
+    !defined(POLARSSL_ECP_DP_BP256R1_ENABLED)   &&              \
+    !defined(POLARSSL_ECP_DP_BP384R1_ENABLED)   &&              \
+    !defined(POLARSSL_ECP_DP_BP512R1_ENABLED) )
 #error "POLARSSL_ECP_C defined, but not all prerequisites"
 #endif
 
diff --git a/library/ecp.c b/library/ecp.c
index 2eb57fa..d980d4b 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -1747,6 +1747,7 @@
     ecp_point R, P;
     mpi m;
     unsigned long add_c_prev, dbl_c_prev;
+    /* exponents especially adapted for secp192r1 */
     const char *exponents[] =
     {
         "000000000000000000000000000000000000000000000000", /* zero */
@@ -1763,27 +1764,12 @@
     ecp_point_init( &P );
     mpi_init( &m );
 
+    /* Use secp192r1 if available, or any available curve */
 #if defined(POLARSSL_ECP_DP_SECP192R1_ENABLED)
     MPI_CHK( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_SECP192R1 ) );
 #else
-#if defined(POLARSSL_ECP_DP_SECP224R1_ENABLED)
-    MPI_CHK( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_SECP224R1 ) );
-#else
-#if defined(POLARSSL_ECP_DP_SECP256R1_ENABLED)
-    MPI_CHK( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_SECP256R1 ) );
-#else
-#if defined(POLARSSL_ECP_DP_SECP384R1_ENABLED)
-    MPI_CHK( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_SECP384R1 ) );
-#else
-#if defined(POLARSSL_ECP_DP_SECP521R1_ENABLED)
-    MPI_CHK( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_SECP521R1 ) );
-#else
-#error No curves defines
-#endif /* POLARSSL_ECP_DP_SECP512R1_ENABLED */
-#endif /* POLARSSL_ECP_DP_SECP384R1_ENABLED */
-#endif /* POLARSSL_ECP_DP_SECP256R1_ENABLED */
-#endif /* POLARSSL_ECP_DP_SECP224R1_ENABLED */
-#endif /* POLARSSL_ECP_DP_SECP192R1_ENABLED */
+    MPI_CHK( ecp_use_known_dp( &grp, ecp_curve_list()->grp_id ) );
+#endif
 
     if( verbose != 0 )
         printf( "  ECP test #1 (constant op_count, base point G): " );