diff --git a/examples/synapses/homeostatic_stdp_at_inhibitory_synapes.py b/examples/synapses/homeostatic_stdp_at_inhibitory_synapes.py
index 018325669..a2fece46f 100755
--- a/examples/synapses/homeostatic_stdp_at_inhibitory_synapes.py
+++ b/examples/synapses/homeostatic_stdp_at_inhibitory_synapes.py
@@ -78,13 +78,13 @@
 dzj/dt = -zj / tau_stdp : 1 (event-driven)
 """
 on_pre = """
-zi += 1.
-wij += eta * G * zj
-"""
-on_post = """
 zj += 1.
 wij += eta * G * (zi + 1)
 """
+on_post = """
+zi += 1.
+wij += eta * G * zj
+"""
 synapse = b2.Synapses(
     presynaptic_neuron, postsynaptic_neuron,
     model=synapse_model, on_pre=on_pre, on_post=on_post