diff --git a/discord/ui/button.py b/discord/ui/button.py
index 8844b9605..649356deb 100644
--- a/discord/ui/button.py
+++ b/discord/ui/button.py
@@ -152,6 +152,7 @@ class Button(Item[V]):
             raise TypeError('custom_id must be None or str')
 
         self._underlying.custom_id = value
+        self._provided_custom_id = value is not None
 
     @property
     def url(self) -> Optional[str]:
diff --git a/discord/ui/select.py b/discord/ui/select.py
index 72148ccc3..852d3ad07 100644
--- a/discord/ui/select.py
+++ b/discord/ui/select.py
@@ -136,6 +136,7 @@ class Select(Item[V]):
             raise TypeError('custom_id must be None or str')
 
         self._underlying.custom_id = value
+        self._provided_custom_id = value is not None
 
     @property
     def placeholder(self) -> Optional[str]: