diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index bc26da2d..07c0c053 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -3980,7 +3980,7 @@ sub qemu_block_resize {
 
     my $running = check_running($vmid);
 
-    return if !PVE::Storage::volume_resize($storecfg, $volid, $size, $running);
+    $size = 0 if !PVE::Storage::volume_resize($storecfg, $volid, $size, $running);
 
     return if !$running;