diff --git a/virtscreen/xrandr.py b/virtscreen/xrandr.py
index e0e5da7..158039f 100644
--- a/virtscreen/xrandr.py
+++ b/virtscreen/xrandr.py
@@ -10,7 +10,7 @@ from .display import Display
 from .process import SubprocessWrapper
 
 
-VIRT_SCREEN_SUFFIX = "_virt"
+VIRT_SCREEN_SUFFIX = "-virt"
 
 
 class XRandR(SubprocessWrapper):