diff --git a/src/common/filetype/base.ts b/src/common/filetype/base.ts
index 7574c19..d29e784 100644
--- a/src/common/filetype/base.ts
+++ b/src/common/filetype/base.ts
@@ -5,6 +5,8 @@ import Option, { None } from '../option.ts';
 // ----------------------------------------------------------------------------
 
 export enum FileLang {
+	C = 'C',
+	CPP = 'C++',
 	TypeScript = 'TypeScript',
 	JavaScript = 'JavaScript',
 	PHP = 'PHP',
@@ -16,6 +18,7 @@ export enum FileLang {
 }
 
 export interface HighlightingOptions {
+	characters: boolean;
 	numbers: boolean;
 	octalNumbers: boolean;
 	hexNumbers: boolean;
@@ -51,6 +54,7 @@ export abstract class AbstractFileType implements IFileType {
 	public readonly keywords2: string[] = [];
 	public readonly operators: string[] = [];
 	public readonly hlOptions: HighlightingOptions = {
+		characters: false,
 		numbers: false,
 		octalNumbers: false,
 		hexNumbers: false,
@@ -78,6 +82,7 @@ export abstract class AbstractFileType implements IFileType {
 }
 
 export const defaultHighlightOptions: HighlightingOptions = {
+	characters: false,
 	numbers: true,
 	octalNumbers: false,
 	hexNumbers: false,
diff --git a/src/common/filetype/filetype.ts b/src/common/filetype/filetype.ts
index 9c8b057..1a9307d 100644
--- a/src/common/filetype/filetype.ts
+++ b/src/common/filetype/filetype.ts
@@ -1,5 +1,6 @@
 import { node_path as path } from '../runtime/mod.ts';
 import { AbstractFileType } from './base.ts';
+import { CFile } from './c.ts'
 import { CSSFile } from './css.ts';
 import { JavaScriptFile, TypeScriptFile } from './javascript.ts';
 import { ShellFile } from './shell.ts';
@@ -10,6 +11,8 @@ import { ShellFile } from './shell.ts';
 
 export class FileType extends AbstractFileType {
 	static #fileTypeMap = new Map([
+		['.c', CFile],
+		['.h', CFile],
 		['.css', CSSFile],
 		['.json', JavaScriptFile],
 		['.js', JavaScriptFile],