diff --git a/core/qubesutils.py b/core/qubesutils.py
index 130faf8a..aba05a3c 100644
--- a/core/qubesutils.py
+++ b/core/qubesutils.py
@@ -337,6 +337,8 @@ def block_check_attached(qvmc, device):
         if vm.qid == 0:
             # Connecting devices to dom0 not supported
             continue
+        if not vm.is_running():
+            continue
         try:
             libvirt_domain = vm.libvirt_domain
             if libvirt_domain: