diff --git a/library/virt b/library/virt
index c1181d7a5d8..5d69e36769a 100755
--- a/library/virt
+++ b/library/virt
@@ -19,6 +19,8 @@ VIRT_FAILED = 1
 VIRT_SUCCESS = 0
 VIRT_UNAVAILABLE=2
 
+import sys
+
 try:
     import libvirt
 except ImportError: