diff --git a/seaborn/categorical.py b/seaborn/categorical.py
index 7c3d2e3cc3..017f0b8648 100644
--- a/seaborn/categorical.py
+++ b/seaborn/categorical.py
@@ -693,7 +693,8 @@ def get_props(element, artist=mpl.lines.Line2D):
                 # Added in matplotlib 3.10; see below
                 # orientation=orientation
                 **(
-                    {"vert": orientation == "x"} if _version_predates(mpl, "3.10.0")
+                    {"vert": orientation == "vertical"}
+                    if _version_predates(mpl, "3.10.0")
                     else {"orientation": orientation}
                 ),
                 # added in matplotlib 3.6.0; see below