diff --git a/src/Css2Xpath.php b/src/Css2Xpath.php
index c3739d4..d601cf9 100644
--- a/src/Css2Xpath.php
+++ b/src/Css2Xpath.php
@@ -55,13 +55,13 @@ public static function transform($path)
                 continue;
             }
             if (0 === strpos($pathSegment, '[contains(')) {
-                foreach ($paths as $key => $xpath) {
-                    $paths[$key] .= '//*' . ltrim($pathSegment, '*');
+                foreach ($paths as $pathKey => $xpath) {
+                    $paths[$pathKey] .= '//*' . ltrim($pathSegment, '*');
                     $paths[]      = $xpath . $pathSegment;
                 }
             } else {
-                foreach ($paths as $key => $xpath) {
-                    $paths[$key] .= '//' . $pathSegment;
+                foreach ($paths as $pathKey => $xpath) {
+                    $paths[$pathKey] .= '//' . $pathSegment;
                 }
             }
         }