diff --git a/src/browser/starter.js b/src/browser/starter.js
index 046a280d..f46c1df7 100644
--- a/src/browser/starter.js
+++ b/src/browser/starter.js
@@ -237,10 +237,10 @@ function V86Starter(options)
             // - loads slices of the file asynchronously as requested
             // - slower get/set
 
-            // Heuristics: If file is smaller than 256M, use SyncFileBuffer
+            // Heuristics: If file is larger than or equal to 256M, use AsyncFileBuffer
             if(file.async === undefined)
             {
-                file.async = file.buffer.size < 256 * 1024 * 1024;
+                file.async = file.buffer.size >= 256 * 1024 * 1024;
             }
 
             if(file.async)