diff --git a/update_engine.gyp b/update_engine.gyp
index 8ca46c1..9f63f01 100644
--- a/update_engine.gyp
+++ b/update_engine.gyp
@@ -150,6 +150,7 @@
           ],
         },
         'libraries': [
+          '-lbspatch',
           '-lbz2',
           '-lrt',
         ],