diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 14a18f0c..b63444df 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -4472,7 +4472,7 @@ sub vmconfig_update_disk {
 
     die "skip\n" if !$hotplug || $opt =~ m/(ide|sata)(\d+)/;
     # hotplug new disks
-    PVE::Storage::activate_volumes($storecfg, [$drive->{file}]);
+    PVE::Storage::activate_volumes($storecfg, [$drive->{file}]) if $drive->{file} !~ m|^/dev/.+|;
     vm_deviceplug($storecfg, $conf, $vmid, $opt, $drive);
 }