diff --git a/src/Composer/Command/InitCommand.php b/src/Composer/Command/InitCommand.php
index 173b77def..408eba903 100644
--- a/src/Composer/Command/InitCommand.php
+++ b/src/Composer/Command/InitCommand.php
@@ -523,7 +523,7 @@ EOT
             explode('/', $packageName)
         );
 
-        return join('\\', $namespace);
+        return implode('\\', $namespace);
     }
 
     /**