diff --git a/onos-build-vm.py b/onos-build-vm.py
index 84ce363..e1ef609 100755
--- a/onos-build-vm.py
+++ b/onos-build-vm.py
@@ -26,7 +26,7 @@
     url = 'https://gerrit.onlab.us/gitweb?p=ONOS-VM.git;a=blob_plain;hb=refs/heads/master;f=vm-setup.sh'
     vm.sendline( 'wget -O - "%s" | bash' % url )
     # end with expect prompt
-    vm.expect( prompt )
+    vm.expect( prompt, timeout=1200 )
 
 def vmdk2size( vmdk ):
     "Return virtual disk size (in bytes) of vmdk image"