diff --git a/binding.gyp b/binding.gyp
index 3a41ba1..785d79a 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -3,7 +3,7 @@
         {
             "target_name": "asajs-compiler",
             "sources": [
-                "src/native/main.cc",
+                "src/native/main.cpp",
             ],
 
             "dependencies": [
diff --git a/src/compilers/Bindings.ts b/src/compilers/Bindings.ts
index d1b999e..d13c8df 100644
--- a/src/compilers/Bindings.ts
+++ b/src/compilers/Bindings.ts
@@ -3,12 +3,6 @@ import { Token } from "./bindings/types.js"
 
 export const {
 	Lexer,
-	isBlankChar,
-	isWordChar,
-	isNumberChar,
 }: {
 	Lexer: (input: string) => Token[]
-	isBlankChar: (char: string) => boolean
-	isWordChar: (char: string) => boolean
-	isNumberChar: (char: string) => boolean
 } = bindings("asajs-compiler")
diff --git a/src/native/main.cc b/src/native/main.cpp
similarity index 89%
rename from src/native/main.cc
rename to src/native/main.cpp
index 2d0e434..91c44a4 100644
--- a/src/native/main.cc
+++ b/src/native/main.cpp
@@ -110,21 +110,6 @@ Napi::Object Init(Napi::Env env, Napi::Object exports) {
 		Napi::Function::New(env, Lexer::Lexer)
 	);
 
-	exports.Set(
-		Napi::String::New(env, "isBlankChar"),
-		Napi::Function::New(env, Lexer::isBlankChar)
-	);
-
-	exports.Set(
-		Napi::String::New(env, "isWordChar"),
-		Napi::Function::New(env, Lexer::isWordChar)
-	);
-
-	exports.Set(
-		Napi::String::New(env, "isNumberChar"),
-		Napi::Function::New(env, Lexer::isNumberChar)
-	);
-
 	return exports;
 }