diff --git a/aegisub/src/colour_button.cpp b/aegisub/src/colour_button.cpp
index 9456472b0..a2822032c 100644
--- a/aegisub/src/colour_button.cpp
+++ b/aegisub/src/colour_button.cpp
@@ -80,6 +80,7 @@ void ColourButton::SetColour(wxColour col) {
 	// when the color has changed
 	wxCommandEvent evt(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
 	evt.SetClientData(this);
+	evt.SetEventObject(this);
 	AddPendingEvent(evt);
 }