diff --git a/types/file-type/file-type-tests.ts b/types/file-type/file-type-tests.ts
index ecfd658a1a..640d2c8fb0 100644
--- a/types/file-type/file-type-tests.ts
+++ b/types/file-type/file-type-tests.ts
@@ -2,3 +2,5 @@ import fileType = require("file-type");
 
 fileType(new Buffer([0xFF, 0xD8, 0xFF]));
 fileType(new Uint8Array([0xFF, 0xD8, 0xFF]));
+
+const minimumBytes: number = fileType.minimumBytes;
diff --git a/types/file-type/index.d.ts b/types/file-type/index.d.ts
index c7f95c256e..2a0deee26a 100644
--- a/types/file-type/index.d.ts
+++ b/types/file-type/index.d.ts
@@ -15,4 +15,6 @@ declare namespace FileType {
         ext: string;
         mime: string;
     }
+
+    const minimumBytes: number;
 }