diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index d0b2be9e25e..ebdf86b7d50 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -683,7 +683,8 @@ GRPCAPI int grpc_tls_credentials_options_set_server_authorization_check_config(
 
 /** Create an empty grpc_tls_key_materials_config instance.
  *  It is used for experimental purpose for now and subject to change. */
-GRPCAPI grpc_tls_key_materials_config* grpc_tls_key_materials_config_create(void);
+GRPCAPI grpc_tls_key_materials_config* grpc_tls_key_materials_config_create(
+    void);
 
 /** Set grpc_tls_key_materials_config instance with provided a TLS certificate.
     config will take the ownership of pem_root_certs and pem_key_cert_pairs.
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 275ca6e9cbf..c25d789a95b 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -440,7 +440,7 @@ extern grpc_local_credentials_create_type grpc_local_credentials_create_import;
 typedef grpc_server_credentials*(*grpc_local_server_credentials_create_type)(grpc_local_connect_type type);
 extern grpc_local_server_credentials_create_type grpc_local_server_credentials_create_import;
 #define grpc_local_server_credentials_create grpc_local_server_credentials_create_import
-typedef grpc_tls_credentials_options*(*grpc_tls_credentials_options_create_type)();
+typedef grpc_tls_credentials_options*(*grpc_tls_credentials_options_create_type)(void);
 extern grpc_tls_credentials_options_create_type grpc_tls_credentials_options_create_import;
 #define grpc_tls_credentials_options_create grpc_tls_credentials_options_create_import
 typedef int(*grpc_tls_credentials_options_set_cert_request_type_type)(grpc_tls_credentials_options* options, grpc_ssl_client_certificate_request_type type);
@@ -455,7 +455,7 @@ extern grpc_tls_credentials_options_set_credential_reload_config_type grpc_tls_c
 typedef int(*grpc_tls_credentials_options_set_server_authorization_check_config_type)(grpc_tls_credentials_options* options, grpc_tls_server_authorization_check_config* config);
 extern grpc_tls_credentials_options_set_server_authorization_check_config_type grpc_tls_credentials_options_set_server_authorization_check_config_import;
 #define grpc_tls_credentials_options_set_server_authorization_check_config grpc_tls_credentials_options_set_server_authorization_check_config_import
-typedef grpc_tls_key_materials_config*(*grpc_tls_key_materials_config_create_type)();
+typedef grpc_tls_key_materials_config*(*grpc_tls_key_materials_config_create_type)(void);
 extern grpc_tls_key_materials_config_create_type grpc_tls_key_materials_config_create_import;
 #define grpc_tls_key_materials_config_create grpc_tls_key_materials_config_create_import
 typedef int(*grpc_tls_key_materials_config_set_key_materials_type)(grpc_tls_key_materials_config* config, const char* pem_root_certs, const grpc_ssl_pem_key_cert_pair** pem_key_cert_pairs, size_t num_key_cert_pairs);