diff --git a/ollama/_types.py b/ollama/_types.py
index 96529d63..fdc00d2d 100644
--- a/ollama/_types.py
+++ b/ollama/_types.py
@@ -334,6 +334,8 @@ class ToolCall(SubscriptableBaseModel):
     """
     Model tool calls.
     """
+    id: Optional[str] = None
+    'ID of the tool call.'
 
     class Function(SubscriptableBaseModel):
       """