diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index 02d87a493a1..de90971cc55 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -532,14 +532,14 @@ typedef struct grpc_alts_credentials_options grpc_alts_credentials_options;
  * It is used for experimental purpose for now and subject to change.
  */
 GRPCAPI grpc_alts_credentials_options*
-grpc_alts_credentials_client_options_create();
+grpc_alts_credentials_client_options_create(void);
 
 /**
  * This method creates a grpc ALTS credentials server options instance.
  * It is used for experimental purpose for now and subject to change.
  */
 GRPCAPI grpc_alts_credentials_options*
-grpc_alts_credentials_server_options_create();
+grpc_alts_credentials_server_options_create(void);
 
 /**
  * This method adds a target service account to grpc client's ALTS credentials
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc b/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc
index 0a39c6c4858..118d18d1191 100644
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc
+++ b/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc
@@ -72,7 +72,8 @@ static void target_service_account_destroy(
 static const grpc_alts_credentials_options_vtable vtable = {
     alts_client_options_copy, alts_client_options_destroy};
 
-grpc_alts_credentials_options* grpc_alts_credentials_client_options_create() {
+grpc_alts_credentials_options* grpc_alts_credentials_client_options_create(
+    void) {
   auto client_options = static_cast<grpc_alts_credentials_client_options*>(
       gpr_zalloc(sizeof(grpc_alts_credentials_client_options)));
   client_options->base.vtable = &vtable;
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc b/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc
index 62aa7a620a0..1a59c456758 100644
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc
+++ b/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc
@@ -36,7 +36,8 @@ static void alts_server_options_destroy(
 static const grpc_alts_credentials_options_vtable vtable = {
     alts_server_options_copy, alts_server_options_destroy};
 
-grpc_alts_credentials_options* grpc_alts_credentials_server_options_create() {
+grpc_alts_credentials_options* grpc_alts_credentials_server_options_create(
+    void) {
   grpc_alts_credentials_server_options* server_options =
       static_cast<grpc_alts_credentials_server_options*>(
           gpr_zalloc(sizeof(*server_options)));
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 99433f0e401..12366829511 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -401,10 +401,10 @@ extern grpc_call_set_credentials_type grpc_call_set_credentials_import;
 typedef void(*grpc_server_credentials_set_auth_metadata_processor_type)(grpc_server_credentials* creds, grpc_auth_metadata_processor processor);
 extern grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
 #define grpc_server_credentials_set_auth_metadata_processor grpc_server_credentials_set_auth_metadata_processor_import
-typedef grpc_alts_credentials_options*(*grpc_alts_credentials_client_options_create_type)();
+typedef grpc_alts_credentials_options*(*grpc_alts_credentials_client_options_create_type)(void);
 extern grpc_alts_credentials_client_options_create_type grpc_alts_credentials_client_options_create_import;
 #define grpc_alts_credentials_client_options_create grpc_alts_credentials_client_options_create_import
-typedef grpc_alts_credentials_options*(*grpc_alts_credentials_server_options_create_type)();
+typedef grpc_alts_credentials_options*(*grpc_alts_credentials_server_options_create_type)(void);
 extern grpc_alts_credentials_server_options_create_type grpc_alts_credentials_server_options_create_import;
 #define grpc_alts_credentials_server_options_create grpc_alts_credentials_server_options_create_import
 typedef void(*grpc_alts_credentials_client_options_add_target_service_account_type)(grpc_alts_credentials_options* options, const char* service_account);