diff --git a/LunaTranslator/LunaTranslator/gui/rangeselect.py b/LunaTranslator/LunaTranslator/gui/rangeselect.py
index e2dd79d7..a5fa8836 100644
--- a/LunaTranslator/LunaTranslator/gui/rangeselect.py
+++ b/LunaTranslator/LunaTranslator/gui/rangeselect.py
@@ -14,6 +14,10 @@ class rangeadjust(Mainw):
         self.traceposstart = pos
 
     def traceoffset(self, curr):
+        keystate = windows.GetKeyState(windows.VK_LBUTTON)
+        if keystate < 0 and windows.GetForegroundWindow() == int(self.winId()):
+            self.tracepos = QPoint()
+            return
         if self._isTracking:
             self.tracepos = QPoint()
             return