diff --git a/index.js b/index.js
index a290fceb..f438532a 100644
--- a/index.js
+++ b/index.js
@@ -941,7 +941,7 @@ const fileType = input => {
 		};
 	}
 
-	if (check([0x77, 0x0B])) {
+	if (check([0x0B, 0x77])) {
 		return {
 			ext: 'ac3',
 			mime: 'audio/vnd.dolby.dd-raw'
diff --git a/test.js b/test.js
index 3eab02f5..0c5069b4 100644
--- a/test.js
+++ b/test.js
@@ -107,7 +107,8 @@ const types = [
 	'dsf',
 	'lnk',
 	'alias',
-	'voc'
+	'voc',
+	'ac3'
 ];
 
 // Define an entry here only if the fixture has a different