diff --git a/vs2010backend.py b/vs2010backend.py
index 2f81444a8..2448bb7e9 100644
--- a/vs2010backend.py
+++ b/vs2010backend.py
@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import backends
+import os, sys
+import backends, build
 import xml.etree.ElementTree as ET
 import xml.dom.minidom