diff --git a/cuburn/render.py b/cuburn/render.py
index d4debd7..0d720c7 100644
--- a/cuburn/render.py
+++ b/cuburn/render.py
@@ -91,7 +91,7 @@ class Framebuffers(object):
         if stream is not None:
             stream.synchronize()
         else:
-            cu
+            cuda.Context.synchronize()
         for p in (self.d_front, self.d_back, self.d_side):
             if p is not None:
                 p.free()