diff --git a/src/Composer/Package/Archiver/BaseExcludeFilter.php b/src/Composer/Package/Archiver/BaseExcludeFilter.php
index 3c89919d2..f8c390e41 100644
--- a/src/Composer/Package/Archiver/BaseExcludeFilter.php
+++ b/src/Composer/Package/Archiver/BaseExcludeFilter.php
@@ -140,6 +140,7 @@ abstract class BaseExcludeFilter
             $pattern .= '/';
         }
 
+        // remove delimiters as well as caret (^) from the regex
         $pattern .= substr(Finder\Glob::toRegex($rule), 2, -1);
 
         return array($pattern . '#', $negate, false);