diff --git a/src/_h5ai/public/js/lib/main/info.js b/src/_h5ai/public/js/lib/main/info.js
index 8fa90ae0..61f9a52c 100644
--- a/src/_h5ai/public/js/lib/main/info.js
+++ b/src/_h5ai/public/js/lib/main/info.js
@@ -83,7 +83,7 @@ const addTests = () => {
     );
 
     addTest(
-        'PHP arch', 'PHP arch is 64-bit',
+        'PHP arch', '64-bit required to correctly display file/folder sizes > ~2GB',
         setup.PHP_ARCH === '64-bit', setup.PHP_ARCH
     );