diff --git a/libratbox/src/openssl.c b/libratbox/src/openssl.c
index e4a12a37..cae15a0a 100644
--- a/libratbox/src/openssl.c
+++ b/libratbox/src/openssl.c
@@ -316,9 +316,9 @@ rb_init_ssl(void)
 	SSL_CTX_set_verify(ssl_server_ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, verify_accept_all_cb);
 	
 	/* Set ECDHE on OpenSSL 1.00+ */
-	if (OPENSSL_VERSION_NUMBER >= 0x10000000) {
+	#if (OPENSSL_VERSION_NUMBER >= 0x10000000)
 		SSL_CTX_set_tmp_ecdh(ssl_server_ctx, EC_KEY_new_by_curve_name(NID_secp384r1));
-	}
+	#endif
 
 	ssl_client_ctx = SSL_CTX_new(TLSv1_client_method());