diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2aa0cb6..2b553ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,14 @@ Changelog
 
 --------
 
+## 3.8.1 - 2022-01-23
+
+### Fixed
+
+* [Linux] Avoid type issue when checking if \STDOUT is defined. [#185](/~https://github.com/thephpleague/climate/issues/185)
+
+--------
+
 ## 3.8.0 - 2022-01-22
 
 ### Changed
diff --git a/src/Util/System/Linux.php b/src/Util/System/Linux.php
index 7ce6016..eae9f08 100644
--- a/src/Util/System/Linux.php
+++ b/src/Util/System/Linux.php
@@ -88,7 +88,7 @@ protected function systemHasAnsiSupport()
         }
 
         # If we're running in a web context then we can't use stdout
-        if (!defined(\STDOUT)) {
+        if (!defined('STDOUT')) {
             return false;
         }
 
diff --git a/tests/AnsiTest.php b/tests/AnsiTest.php
index 8cfec16..1268edb 100644
--- a/tests/AnsiTest.php
+++ b/tests/AnsiTest.php
@@ -107,4 +107,22 @@ public function it_will_force_ansi_off_on_an_ansi_system()
 
         $this->cli->out("<green>I am green</green>");
     }
+
+
+    /**
+     * Ensure we can check if stdout is defined safely.
+     * /~https://github.com/thephpleague/climate/issues/185
+     */
+    public function test6()
+    {
+        $system = new Linux();
+        $util = new UtilFactory($system);
+        $this->cli->setUtil($util);
+
+        $this->shouldWrite("\e[m\e[32mI am green\e[0m\e[0m");
+        $this->shouldHavePersisted();
+
+        $this->cli->out("<green>I am green</green>");
+        self::assertTrue(true);
+    }
 }