diff --git a/dictionaries/CallMap.php b/dictionaries/CallMap.php
index 47b8bb4b3..8f2203205 100644
--- a/dictionaries/CallMap.php
+++ b/dictionaries/CallMap.php
@@ -1613,7 +1613,7 @@ return [
 'DirectoryIterator::setFileClass' => ['void', 'class='=>'class-string'],
 'DirectoryIterator::setInfoClass' => ['void', 'class='=>'class-string'],
 'DirectoryIterator::valid' => ['bool'],
-'dirname' => ['string', 'path'=>'string', 'levels='=>'int'],
+'dirname' => ['string', 'path'=>'string', 'levels='=>'int<1, max>'],
 'disk_free_space' => ['float|false', 'directory'=>'string'],
 'disk_total_space' => ['float|false', 'directory'=>'string'],
 'diskfreespace' => ['float|false', 'directory'=>'string'],
diff --git a/dictionaries/CallMap_historical.php b/dictionaries/CallMap_historical.php
index e0d17e994..031e013ef 100644
--- a/dictionaries/CallMap_historical.php
+++ b/dictionaries/CallMap_historical.php
@@ -9995,7 +9995,7 @@ return [
     'dio_truncate' => ['bool', 'fd'=>'resource', 'offset'=>'int'],
     'dio_write' => ['int', 'fd'=>'resource', 'data'=>'string', 'length='=>'int'],
     'dir' => ['Directory|false', 'directory'=>'string', 'context='=>'resource'],
-    'dirname' => ['string', 'path'=>'string', 'levels='=>'int'],
+    'dirname' => ['string', 'path'=>'string', 'levels='=>'int<1, max>'],
     'disk_free_space' => ['float|false', 'directory'=>'string'],
     'disk_total_space' => ['float|false', 'directory'=>'string'],
     'diskfreespace' => ['float|false', 'directory'=>'string'],