diff --git a/src/core.py b/src/core.py
--- a/src/core.py
+++ b/src/core.py
@@ -63,7 +63,7 @@ class Core:
 
 	def joinGui(self):
 		self._guiProc.join()
-		self._ownMessages.send("!kill")
+		self._ownMessages.send("!kill",("core",))
 
 	def _handleEvent(self,e):
 		actions={