diff --git a/src/sha3.js b/src/sha3.js
index 6612704..8a5a36e 100644
--- a/src/sha3.js
+++ b/src/sha3.js
@@ -64,15 +64,14 @@
     if (type === 'string') {
       return [message, false];
     }
-    if (type === 'object') {
-      if (message === null) {
-        throw new Error(INPUT_ERROR);
-      } else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
-        message = new Uint8Array(message);
-      } else if (!isArray(message) && !isView(message)) {
-        throw new Error(INPUT_ERROR);
-      }
-    } else {
+    if (type !== 'object') {
+      throw new Error(INPUT_ERROR);
+    }
+    if (message === null) {
+      throw new Error(INPUT_ERROR);
+    } else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
+      message = new Uint8Array(message);
+    } else if (!isArray(message) && !isView(message)) {
       throw new Error(INPUT_ERROR);
     }
     return [message, true];