diff --git a/examples/symba_chambers_2013/init_cond.py b/examples/symba_chambers_2013/init_cond.py
index 38b023ed1..aa213a5ab 100755
--- a/examples/symba_chambers_2013/init_cond.py
+++ b/examples/symba_chambers_2013/init_cond.py
@@ -14,7 +14,6 @@
 sim.param['MU2KG'] = MU2KG
 sim.param['TU2S'] = TU2S
 sim.param['DU2M'] = DU2M
-sim.param['GU'] = GU
 
 # Simulation time parameters
 sim.param['T0'] = 0.0