diff --git a/typo3/sysext/core/Classes/Routing/PageRouter.php b/typo3/sysext/core/Classes/Routing/PageRouter.php
index 19e48bb2402f7ea6d2cd91f82bf2a9c4a238754c..156d12a95acd48b707bd0d6cad05b432618bdadf 100644
--- a/typo3/sysext/core/Classes/Routing/PageRouter.php
+++ b/typo3/sysext/core/Classes/Routing/PageRouter.php
@@ -392,7 +392,7 @@ class PageRouter implements RouterInterface
             // Slug prefixes are taken from the beginning of the array, where as the parts to be removed
             // Are taken from the end.
             $replacement = array_shift($slugPrefixesToAdd);
-            if (strpos($pagePath, $prefixToRemove) === 0) {
+            if ($prefixToRemove !== '' && strpos($pagePath, $prefixToRemove) === 0) {
                 $pagePath = substr($pagePath, strlen($prefixToRemove));
             }
             $pagePath = $replacement . '/' . ltrim($pagePath, '/');