diff --git a/src/cjs/index.cjs b/src/cjs/index.cjs
index 9f15cc0..0124347 100644
--- a/src/cjs/index.cjs
+++ b/src/cjs/index.cjs
@@ -22,7 +22,8 @@ function base (ALPHABET) {
   const FACTOR = Math.log(BASE) / Math.log(256) // log(BASE) / log(256), rounded up
   const iFACTOR = Math.log(256) / Math.log(BASE) // log(256) / log(BASE), rounded up
   function encode (source) {
-    if (ArrayBuffer.isView(source)) {
+    // eslint-disable-next-line no-empty
+    if (source instanceof Uint8Array) { } else if (ArrayBuffer.isView(source)) {
       source = new Uint8Array(source.buffer, source.byteOffset, source.byteLength)
     } else if (Array.isArray(source)) {
       source = Uint8Array.from(source)
diff --git a/src/esm/index.js b/src/esm/index.js
index f09bfbe..ac60db8 100644
--- a/src/esm/index.js
+++ b/src/esm/index.js
@@ -20,7 +20,8 @@ function base (ALPHABET) {
   const FACTOR = Math.log(BASE) / Math.log(256) // log(BASE) / log(256), rounded up
   const iFACTOR = Math.log(256) / Math.log(BASE) // log(256) / log(BASE), rounded up
   function encode (source) {
-    if (ArrayBuffer.isView(source)) {
+    // eslint-disable-next-line no-empty
+    if (source instanceof Uint8Array) { } else if (ArrayBuffer.isView(source)) {
       source = new Uint8Array(source.buffer, source.byteOffset, source.byteLength)
     } else if (Array.isArray(source)) {
       source = Uint8Array.from(source)
diff --git a/ts_src/index.ts b/ts_src/index.ts
index dd1251b..66e0e4b 100644
--- a/ts_src/index.ts
+++ b/ts_src/index.ts
@@ -26,7 +26,9 @@ function base (ALPHABET: string): base.BaseConverter {
   const iFACTOR = Math.log(256) / Math.log(BASE) // log(256) / log(BASE), rounded up
 
   function encode (source: Uint8Array | number[]): string {
-    if (ArrayBuffer.isView(source)) {
+    //eslint-disable-next-line no-empty
+    if (source instanceof Uint8Array) {}
+    else if (ArrayBuffer.isView(source)) {
       source = new Uint8Array(source.buffer, source.byteOffset, source.byteLength)
     } else if (Array.isArray(source)) {
       source = Uint8Array.from(source)