diff --git a/src/index.test.ts b/src/index.test.ts
index 8dbfda9..56b4c62 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -41,8 +41,8 @@ describe('chardet', () => {
       expect(res).toBe('UTF-8');
     });
 
-    it('should detect encoding with smaller sample size and position offset', async () => {
-      const res = await chardet.detectFile(path, { sampleSize: 32, position: 64 });
+    it('should detect encoding with smaller sample size and offset', async () => {
+      const res = await chardet.detectFile(path, { sampleSize: 32, offset: 64 });
       expect(res).toBe('UTF-8');
     });
   });
@@ -56,8 +56,8 @@ describe('chardet', () => {
       expect(chardet.detectFileSync(path, { sampleSize: 32 })).toBe('UTF-8');
     });
 
-    it('should detect encoding with smaller sample size and position offset', () => {
-      expect(chardet.detectFileSync(path, { sampleSize: 32, position: 64 })).toBe('UTF-8');
+    it('should detect encoding with smaller sample size and offset', () => {
+      expect(chardet.detectFileSync(path, { sampleSize: 32, offset: 64 })).toBe('UTF-8');
     });
   });
 
diff --git a/src/index.ts b/src/index.ts
index d6e5fc7..a43ade3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,7 +11,7 @@ import * as iso2022 from './encoding/iso2022';
 
 interface FullOptions {
   sampleSize: number,
-  position: number
+  offset: number
 }
 
 type Options = Partial<FullOptions>
@@ -108,7 +108,7 @@ export const detectFile = (filepath: string, opts: Options = {}): Promise<Detect
       fd = fs.openSync(filepath, 'r');
       const sample: Buffer = Buffer.allocUnsafe(opts.sampleSize);
 
-      fs.read(fd, sample, 0, opts.sampleSize, opts.position, (err?: Error) => {
+      fs.read(fd, sample, 0, opts.sampleSize, opts.offset, (err?: Error) => {
         handler(err, sample);
       });
       return;
@@ -124,7 +124,7 @@ export const detectFileSync = (filepath: string, opts: Options = {}): DetectResu
     const fd = fs.openSync(filepath, 'r');
     const sample = Buffer.allocUnsafe(opts.sampleSize);
 
-    fs.readSync(fd, sample, 0, opts.sampleSize, opts.position);
+    fs.readSync(fd, sample, 0, opts.sampleSize, opts.offset);
     fs.closeSync(fd);
     return detect(sample);
   }