diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
index 137611ab6703..e7edb0e7448f 100644
--- a/lib/matplotlib/backend_bases.py
+++ b/lib/matplotlib/backend_bases.py
@@ -1262,7 +1262,7 @@ class LocationEvent(Event):
     xdata, ydata : float or None
         Data coordinates of the mouse within *inaxes*, or *None* if the mouse
         is not over an Axes.
-    modifiers : frozenset
+    modifiers : frozenset[str]
         The keyboard modifiers currently being pressed (except for KeyEvent).
     """
 
diff --git a/lib/matplotlib/backend_bases.pyi b/lib/matplotlib/backend_bases.pyi
index 7a2b28262249..a69b36093839 100644
--- a/lib/matplotlib/backend_bases.pyi
+++ b/lib/matplotlib/backend_bases.pyi
@@ -237,6 +237,7 @@ class LocationEvent(Event):
     inaxes: Axes | None
     xdata: float | None
     ydata: float | None
+    modifiers: frozenset[str]
     def __init__(
         self,
         name: str,