diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 8c61cb9..a4ca1d0 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -423,58 +423,84 @@
         case PSA_ECC_FAMILY_SECP_R1:
             switch( bits )
             {
+#if defined(PSA_WANT_ECC_SECP_R1_192)
                 case 192:
                     return( MBEDTLS_ECP_DP_SECP192R1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_R1_224)
                 case 224:
                     return( MBEDTLS_ECP_DP_SECP224R1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_R1_256)
                 case 256:
                     return( MBEDTLS_ECP_DP_SECP256R1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_R1_384)
                 case 384:
                     return( MBEDTLS_ECP_DP_SECP384R1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_R1_521)
                 case 521:
                     return( MBEDTLS_ECP_DP_SECP521R1 );
                 case 528:
                     if( bits_is_sloppy )
                         return( MBEDTLS_ECP_DP_SECP521R1 );
                     break;
+#endif
             }
             break;
 
         case PSA_ECC_FAMILY_BRAINPOOL_P_R1:
             switch( bits )
             {
+#if defined(PSA_WANT_ECC_BRAINPOOL_P_R1_256)
                 case 256:
                     return( MBEDTLS_ECP_DP_BP256R1 );
+#endif
+#if defined(PSA_WANT_ECC_BRAINPOOL_P_R1_384)
                 case 384:
                     return( MBEDTLS_ECP_DP_BP384R1 );
+#endif
+#if defined(PSA_WANT_ECC_BRAINPOOL_P_R1_512)
                 case 512:
                     return( MBEDTLS_ECP_DP_BP512R1 );
+#endif
             }
             break;
 
         case PSA_ECC_FAMILY_MONTGOMERY:
             switch( bits )
             {
+#if defined(PSA_WANT_ECC_MONTGOMERY_255)
                 case 255:
                     return( MBEDTLS_ECP_DP_CURVE25519 );
                 case 256:
                     if( bits_is_sloppy )
                         return( MBEDTLS_ECP_DP_CURVE25519 );
                     break;
+#endif
+#if defined(PSA_WANT_ECC_MONTGOMERY_448)
                 case 448:
                     return( MBEDTLS_ECP_DP_CURVE448 );
+#endif
             }
             break;
 
         case PSA_ECC_FAMILY_SECP_K1:
             switch( bits )
             {
+#if defined(PSA_WANT_ECC_SECP_K1_192)
                 case 192:
                     return( MBEDTLS_ECP_DP_SECP192K1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_K1_224)
                 case 224:
                     return( MBEDTLS_ECP_DP_SECP224K1 );
+#endif
+#if defined(PSA_WANT_ECC_SECP_K1_256)
                 case 256:
                     return( MBEDTLS_ECP_DP_SECP256K1 );
+#endif
             }
             break;
     }