diff --git a/aegisub/src/video_display.cpp b/aegisub/src/video_display.cpp
index 0db6830ab..5df711cb1 100644
--- a/aegisub/src/video_display.cpp
+++ b/aegisub/src/video_display.cpp
@@ -351,7 +351,7 @@ void VideoDisplay::OnMouseEvent(wxMouseEvent& event) {
 	if (event.ButtonDown())
 		SetFocus();
 
-	mouse_pos = event.GetPosition();
+	last_mouse_pos = mouse_pos = event.GetPosition();
 
 	if (tool)
 		tool->OnMouseEvent(event);
@@ -424,7 +424,7 @@ bool VideoDisplay::ToolIsType(std::type_info const& type) const {
 }
 
 Vector2D VideoDisplay::GetMousePosition() const {
-	return mouse_pos ? tool->ToScriptCoords(mouse_pos) : mouse_pos;
+	return last_mouse_pos ? tool->ToScriptCoords(last_mouse_pos) : last_mouse_pos;
 }
 
 void VideoDisplay::Unload() {
diff --git a/aegisub/src/video_display.h b/aegisub/src/video_display.h
index a6a73fded..5e5bf91f2 100644
--- a/aegisub/src/video_display.h
+++ b/aegisub/src/video_display.h
@@ -83,7 +83,7 @@ class VideoDisplay : public wxGLCanvas {
 	/// be the same as the actual client size of the display
 	wxSize videoSize;
 
-	Vector2D mouse_pos;
+	Vector2D last_mouse_pos, mouse_pos;
 
 	/// Screen pixels between the left of the canvas and the left of the video
 	int viewport_left;