diff --git a/library/ecdsa.c b/library/ecdsa.c
index 37379bc..54ecab1 100644
--- a/library/ecdsa.c
+++ b/library/ecdsa.c
@@ -237,6 +237,7 @@
     return( ret );
 }
 
+#if !defined(MBEDTLS_ECDSA_SIGN_ALT)
 /*
  * Compute ECDSA signature of a hashed message (SEC1 4.1.3)
  * Obviously, compared to SEC1 4.1.3, we skip step 4 (hash message)
@@ -369,7 +370,6 @@
     return( ret );
 }
 
-#if !defined(MBEDTLS_ECDSA_SIGN_ALT)
 /*
  * Compute ECDSA signature of a hashed message
  */
@@ -380,7 +380,7 @@
     return( ecdsa_sign_restartable( grp, r, s, d, buf, blen,
                                     f_rng, p_rng, NULL ) );
 }
-#endif /* MBEDTLS_ECDSA_SIGN_ALT */
+#endif /* !MBEDTLS_ECDSA_SIGN_ALT */
 
 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
 /*
@@ -438,7 +438,7 @@
 #else
     ret = ecdsa_sign_restartable( grp, r, s, d, buf, blen,
                       mbedtls_hmac_drbg_random, p_rng, rs_ctx );
-#endif
+#endif /* MBEDTLS_ECDSA_SIGN_ALT */
 
 cleanup:
     mbedtls_hmac_drbg_free( &rng_ctx );
@@ -460,6 +460,7 @@
 }
 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
 
+#if !defined(MBEDTLS_ECDSA_VERIFY_ALT)
 /*
  * Verify ECDSA signature of hashed message (SEC1 4.1.4)
  * Obviously, compared to SEC1 4.1.3, we skip step 2 (hash message)
@@ -569,7 +570,6 @@
     return( ret );
 }
 
-#if !defined(MBEDTLS_ECDSA_VERIFY_ALT)
 /*
  * Verify ECDSA signature of hashed message
  */
@@ -579,7 +579,7 @@
 {
     return( ecdsa_verify_restartable( grp, buf, blen, Q, r, s, NULL ) );
 }
-#endif /* MBEDTLS_ECDSA_VERIFY_ALT */
+#endif /* !MBEDTLS_ECDSA_VERIFY_ALT */
 
 /*
  * Convert a signature (given by context) to ASN.1
@@ -637,7 +637,7 @@
 #else
     MBEDTLS_MPI_CHK( ecdsa_sign_restartable( &ctx->grp, &r, &s, &ctx->d,
                          hash, hlen, f_rng, p_rng, rs_ctx ) );
-#endif
+#endif /* MBEDTLS_ECDSA_SIGN_ALT */
 #endif
 
     MBEDTLS_MPI_CHK( ecdsa_signature_to_asn1( &r, &s, sig, slen ) );
@@ -730,7 +730,7 @@
     if( ( ret = ecdsa_verify_restartable( &ctx->grp, hash, hlen,
                               &ctx->Q, &r, &s, rs_ctx ) ) != 0 )
         goto cleanup;
-#endif
+#endif /* MBEDTLS_ECDSA_VERIFY_ALT */
 
     /* At this point we know that the buffer starts with a valid signature.
      * Return 0 if the buffer just contains the signature, and a specific
@@ -755,7 +755,7 @@
     return( mbedtls_ecp_group_load( &ctx->grp, gid ) ||
             mbedtls_ecp_gen_keypair( &ctx->grp, &ctx->d, &ctx->Q, f_rng, p_rng ) );
 }
-#endif /* MBEDTLS_ECDSA_GENKEY_ALT */
+#endif /* !MBEDTLS_ECDSA_GENKEY_ALT */
 
 /*
  * Set context from an mbedtls_ecp_keypair