diff --git a/source/blender/editors/interface/interface_intern.hh b/source/blender/editors/interface/interface_intern.hh
index b66bf640de4..2364b5bdd50 100644
--- a/source/blender/editors/interface/interface_intern.hh
+++ b/source/blender/editors/interface/interface_intern.hh
@@ -458,7 +458,7 @@ struct uiButCurveMapping : public uiBut {
 
 /** Derived struct for #UI_BTYPE_HOTKEY_EVENT. */
 struct uiButHotkeyEvent : public uiBut {
-  short modifier_key = 0;
+  uint8_t modifier_key = 0;
 };
 
 /**