diff --git a/stdlib/tkinter/__init__.pyi b/stdlib/tkinter/__init__.pyi
index a0a88a8ac..51ed55db8 100644
--- a/stdlib/tkinter/__init__.pyi
+++ b/stdlib/tkinter/__init__.pyi
@@ -2888,7 +2888,7 @@ class Scrollbar(Widget):
     def fraction(self, x: int, y: int) -> float: ...
     def identify(self, x: int, y: int) -> Literal["arrow1", "arrow2", "slider", "trough1", "trough2", ""]: ...
     def get(self) -> tuple[float, float, float, float] | tuple[float, float]: ...
-    def set(self, first: float, last: float) -> None: ...
+    def set(self, first: float | str, last: float | str) -> None: ...
 
 _TextIndex: TypeAlias = _tkinter.Tcl_Obj | str | float | Misc