1 files changed, 2 insertions, 0 deletions
diff --git a/protocols.py b/protocols.py
index 9f1834ec..f98731e4 100644
--- a/protocols.py
+++ b/protocols.py
@@ -81,6 +81,8 @@ def const_infer_binary_op(self, operator, other, context):
             except TypeError:
                 # XXX log TypeError
                 continue
+        elif other is YES:
+            yield other
         else:
             try:
                 for val in other.infer_binary_op(operator, self, context):