diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 9262614c35..5eddc12ac9 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -14,6 +14,7 @@ Yii Framework 2 Change Log
 - Bug #9591: Fixed `yii.validation.js` code so it is compressable by YUICompressor (samdark, hofrob)
 - Bug #9596: Fixed `\yii\web\UrlManager::createAbsoluteUrl(['site/index', '#' => 'testHash'])` losing hash (alchimik, samdark)
 - Bug #9678: `I18N::format()` wasn't able to handle named placeholder in "selectordinal" (samdark)
+- Bug #9754: Fixed `\yii\web\Request` error when path info is empty (dynasource)
 - Chg #9369: `Yii::$app->user->can()` now returns `false` instead of erroring in case `authManager` component is not configured (creocoder)
 - Chg #9411: `DetailView` now automatically sets container tag ID in case it's not specified (samdark)
 - Enh #9635: Added default CSS class for `\yii\grid\ActionColumn` header (arogachev, dynasource)
diff --git a/framework/web/Request.php b/framework/web/Request.php
index 4dc5118135..73985737f8 100644
--- a/framework/web/Request.php
+++ b/framework/web/Request.php
@@ -723,7 +723,7 @@ class Request extends \yii\base\Request
             throw new InvalidConfigException('Unable to determine the path info of the current request.');
         }
 
-        if ($pathInfo[0] === '/') {
+        if (substr($pathInfo, 0, 1) === '/') {
             $pathInfo = substr($pathInfo, 1);
         }