diff --git a/tools/cc.py b/tools/cc.py
index ac70e2c..7ade75c 100644
--- a/tools/cc.py
+++ b/tools/cc.py
@@ -885,7 +885,8 @@ class CcInterp(lark.visitors.Interpreter):
 
     def _combo(uop, bop):
         def _f(self, tree):
-            bop.__get__(self)(tree)
+            ftree = lark.Tree(bop, tree.children)
+            tree.children = [ftree]
             uop.__get__(self)(tree)
         return _f
 
@@ -898,7 +899,7 @@ class CcInterp(lark.visitors.Interpreter):
     gt = _binary_op(GtOp)
     lt = _binary_op(LtOp)
     neq = _binary_op(NeqOp)
-    eq = _combo(bool_not, neq)
+    eq = _combo(bool_not, 'neq')
 
     def _forward_op(self, tree):
         self.visit_children(tree)