diff --git a/Finder.php b/Finder.php
index 33a76cc9..3e8a9483 100644
--- a/Finder.php
+++ b/Finder.php
@@ -541,7 +541,7 @@ public function in($dirs)
         foreach ((array) $dirs as $dir) {
             if (is_dir($dir)) {
                 $resolvedDirs[] = $this->normalizeDir($dir);
-            } elseif ($glob = glob($dir, (\defined('GLOB_BRACE') ? GLOB_BRACE : 0) | GLOB_ONLYDIR | GLOB_NOSORT)) {
+            } elseif ($glob = glob($dir, (\defined('GLOB_BRACE') ? \GLOB_BRACE : 0) | \GLOB_ONLYDIR | \GLOB_NOSORT)) {
                 sort($glob);
                 $resolvedDirs = array_merge($resolvedDirs, array_map([$this, 'normalizeDir'], $glob));
             } else {
@@ -658,7 +658,7 @@ private function searchInDirectory($dir)
         }
 
         $minDepth = 0;
-        $maxDepth = PHP_INT_MAX;
+        $maxDepth = \PHP_INT_MAX;
 
         foreach ($this->depths as $comparator) {
             switch ($comparator->getOperator()) {
@@ -693,7 +693,7 @@ private function searchInDirectory($dir)
 
         $iterator = new \RecursiveIteratorIterator($iterator, \RecursiveIteratorIterator::SELF_FIRST);
 
-        if ($minDepth > 0 || $maxDepth < PHP_INT_MAX) {
+        if ($minDepth > 0 || $maxDepth < \PHP_INT_MAX) {
             $iterator = new Iterator\DepthRangeFilterIterator($iterator, $minDepth, $maxDepth);
         }
 
diff --git a/Iterator/DepthRangeFilterIterator.php b/Iterator/DepthRangeFilterIterator.php
index ce9d3aa7..d9bbeb48 100644
--- a/Iterator/DepthRangeFilterIterator.php
+++ b/Iterator/DepthRangeFilterIterator.php
@@ -25,10 +25,10 @@ class DepthRangeFilterIterator extends FilterIterator
      * @param int                        $minDepth The min depth
      * @param int                        $maxDepth The max depth
      */
-    public function __construct(\RecursiveIteratorIterator $iterator, $minDepth = 0, $maxDepth = PHP_INT_MAX)
+    public function __construct(\RecursiveIteratorIterator $iterator, $minDepth = 0, $maxDepth = \PHP_INT_MAX)
     {
         $this->minDepth = $minDepth;
-        $iterator->setMaxDepth(PHP_INT_MAX === $maxDepth ? -1 : $maxDepth);
+        $iterator->setMaxDepth(\PHP_INT_MAX === $maxDepth ? -1 : $maxDepth);
 
         parent::__construct($iterator);
     }
diff --git a/Tests/Iterator/DepthRangeFilterIteratorTest.php b/Tests/Iterator/DepthRangeFilterIteratorTest.php
index dab9723d..5ef2ed41 100644
--- a/Tests/Iterator/DepthRangeFilterIteratorTest.php
+++ b/Tests/Iterator/DepthRangeFilterIteratorTest.php
@@ -75,8 +75,8 @@ public function getAcceptData()
         return [
             [0, 0, $this->toAbsolute($lessThan1)],
             [0, 1, $this->toAbsolute($lessThanOrEqualTo1)],
-            [2, PHP_INT_MAX, []],
-            [1, PHP_INT_MAX, $this->toAbsolute($graterThanOrEqualTo1)],
+            [2, \PHP_INT_MAX, []],
+            [1, \PHP_INT_MAX, $this->toAbsolute($graterThanOrEqualTo1)],
             [1, 1, $this->toAbsolute($equalTo1)],
         ];
     }