diff --git a/examples/ConfigFiles/Phase_Phenopowerlaw_BCC-Ferrite.config b/examples/ConfigFiles/Phase_Phenopowerlaw_BCC-Ferrite.config
index 87b4e2312..5af1eee11 100644
--- a/examples/ConfigFiles/Phase_Phenopowerlaw_BCC-Ferrite.config
+++ b/examples/ConfigFiles/Phase_Phenopowerlaw_BCC-Ferrite.config
@@ -18,4 +18,4 @@ tau0_slip                95.e6  97.e6           # per family, optimization long
 tausat_slip             222.e6 412.7e6          # per family, optimization long simplex 109
 h0_slipslip             1000.0e6
 interaction_slipslip    1 1 1.4 1.4 1.4 1.4
-w0_slip                 2.0
+a_slip                 2.0