diff --git a/aegisub/src/persist_location.cpp b/aegisub/src/persist_location.cpp
index b6c654919..95c05e05b 100644
--- a/aegisub/src/persist_location.cpp
+++ b/aegisub/src/persist_location.cpp
@@ -35,6 +35,7 @@ PersistLocation::PersistLocation(wxDialog *dialog, std::string options_prefix)
 : x_opt(OPT_SET(options_prefix + "/Last/X"))
 , y_opt(OPT_SET(options_prefix + "/Last/Y"))
 , maximize_opt(OPT_SET(options_prefix + "/Maximized"))
+, dialog(dialog)
 {
 	dialog->Bind(wxEVT_MOVE, &PersistLocation::OnMove, this);
 	dialog->Bind(wxEVT_ICONIZE, &PersistLocation::OnMinimize, this);
@@ -78,8 +79,8 @@ PersistLocation::PersistLocation(wxDialog *dialog, std::string options_prefix)
 	}
 }
 
-void PersistLocation::OnMove(wxMoveEvent &evt) {
-	wxPoint pos = evt.GetPosition();
+void PersistLocation::OnMove(wxMoveEvent &) {
+	wxPoint pos = dialog->GetPosition();
 	x_opt->SetInt(pos.x);
 	y_opt->SetInt(pos.y);
 }
diff --git a/aegisub/src/persist_location.h b/aegisub/src/persist_location.h
index 105b62dc5..07c50368b 100644
--- a/aegisub/src/persist_location.h
+++ b/aegisub/src/persist_location.h
@@ -40,8 +40,9 @@ class PersistLocation {
 	agi::OptionValue *x_opt;
 	agi::OptionValue *y_opt;
 	agi::OptionValue *maximize_opt;
+	class wxDialog *dialog;
 
-	void OnMove(wxMoveEvent &evt);
+	void OnMove(wxMoveEvent &);
 	void OnMinimize(wxIconizeEvent &evt);
 
 public: