diff --git a/src/gallium/drivers/zink/zink_extensions.py b/src/gallium/drivers/zink/zink_extensions.py
index c2869b264a8..656cfdf17b6 100644
--- a/src/gallium/drivers/zink/zink_extensions.py
+++ b/src/gallium/drivers/zink/zink_extensions.py
@@ -22,10 +22,11 @@
 
 import re
 from xml.etree import ElementTree
+from typing import List,Tuple
 
 class Version:
-    device_version  : (1,0,0)
-    struct_version  : (1,0)
+    device_version : Tuple[int, int, int] = (1,0,0)
+    struct_version : Tuple[int, int] = (1,0)
 
     def __init__(self, version, struct=()):
         self.device_version = version
@@ -58,20 +59,20 @@ class Version:
                 + '_' + struct)
 
 class Extension:
-    name           : str   = None
-    alias          : str   = None
-    is_required    : bool  = False
-    is_nonstandard : bool  = False
-    enable_conds   : [str] = None
+    name           : str       = None
+    alias          : str       = None
+    is_required    : bool      = False
+    is_nonstandard : bool      = False
+    enable_conds   : List[str] = None
 
     # these are specific to zink_device_info.py:
-    has_properties : bool  = False
-    has_features   : bool  = False
-    guard          : bool  = False
+    has_properties : bool      = False
+    has_features   : bool      = False
+    guard          : bool      = False
 
     # these are specific to zink_instance.py:
-    core_since     : Version = None
-    instance_funcs : [str]   = None
+    core_since     : Version   = None
+    instance_funcs : List[str] = None
 
     def __init__(self, name, alias="", required=False, nonstandard=False,
                  properties=False, features=False, conditions=None, guard=False,
@@ -146,14 +147,14 @@ Layer = Extension
 
 class ExtensionRegistryEntry:
     # type of extension - right now it's either "instance" or "device"
-    ext_type    : str     = ""
+    ext_type          : str       = ""
     # the version in which the extension is promoted to core VK
-    promoted_in : Version = None
+    promoted_in       : Version   = None
     # functions added by the extension are referred to as "commands" in the registry
-    commands    : [str]   = None
-    constants   : [str]   = None
-    features_struct   : str = None
-    properties_struct : str = None
+    commands          : List[str] = None
+    constants         : List[str] = None
+    features_struct   : str       = None
+    properties_struct : str       = None
 
 class ExtensionRegistry:
     # key = extension name, value = registry entry