diff --git a/src/Composer/Util/ConfigValidator.php b/src/Composer/Util/ConfigValidator.php
index 670c9d755..5bd915388 100644
--- a/src/Composer/Util/ConfigValidator.php
+++ b/src/Composer/Util/ConfigValidator.php
@@ -110,12 +110,12 @@ class ConfigValidator
 
         // check for require-dev overrides
         if (isset($manifest['require']) && isset($manifest['require-dev'])) {
-          $requireOverrides = array_intersect_key($manifest['require'], $manifest['require-dev']);
+            $requireOverrides = array_intersect_key($manifest['require'], $manifest['require-dev']);
 
-          if (!empty($requireOverrides)) {
-            $plural = (count($requireOverrides) > 1) ? 'are' : 'is';
-            $warnings[] = implode(', ', array_keys($requireOverrides)). " {$plural} required both in require and require-dev, this can lead to unexpected behavior";
-          }
+            if (!empty($requireOverrides)) {
+                $plural = (count($requireOverrides) > 1) ? 'are' : 'is';
+                $warnings[] = implode(', ', array_keys($requireOverrides)). " {$plural} required both in require and require-dev, this can lead to unexpected behavior";
+            }
         }
 
         try {