diff --git a/gpkitmodels/GP/aircraft/wing/wing.py b/gpkitmodels/GP/aircraft/wing/wing.py
index 12657e26..8af6b84e 100644
--- a/gpkitmodels/GP/aircraft/wing/wing.py
+++ b/gpkitmodels/GP/aircraft/wing/wing.py
@@ -29,9 +29,9 @@ def setup(self, N):
                            lambda c: 2.0/3.0*(1+c[lam]+c[lam]**2)/(1+c[lam]),
                            "-", "non-dim MAC")
         with Vectorize(N):
+            eta = Variable("\\eta", "-", "(2y/b)")
             cbar = Variable("\\bar{c}", "-",
                             "normalized chord at mid element")
-            eta = Variable("\\eta", "-", "(2y/b)")
         with Vectorize(N-1):
             cbave = Variable("\\bar{c}_{ave}", "-",
                              "normalized mid section chord")