diff --git a/library/ssl_client.h b/library/ssl_client.h
index be4d067..f57bea3 100644
--- a/library/ssl_client.h
+++ b/library/ssl_client.h
@@ -29,6 +29,6 @@
 #include <stddef.h>
 
 MBEDTLS_CHECK_RETURN_CRITICAL
-int mbedtls_ssl_write_client_hello( mbedtls_ssl_context *ssl );
+int mbedtls_ssl_write_client_hello(mbedtls_ssl_context *ssl);
 
 #endif /* MBEDTLS_SSL_CLIENT_H */