diff --git a/src/mcedit2/main.py b/src/mcedit2/main.py
index 62bd624..2752083 100644
--- a/src/mcedit2/main.py
+++ b/src/mcedit2/main.py
@@ -157,6 +157,8 @@ editorApp = None
 
 @profiler.function("startup")
 def startup():
+    # Must call this before QApplication is created
+    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_X11InitThreads, True)
     global editorApp
     setup_logging()
     sys.excepthook = excepthook