diff --git a/examples/vector/plot_vector_ctrl_im_2kw_tq_mode.py b/examples/vector/plot_vector_ctrl_im_2kw_tq_mode.py
index ee64b23af..0fa3f3635 100644
--- a/examples/vector/plot_vector_ctrl_im_2kw_tq_mode.py
+++ b/examples/vector/plot_vector_ctrl_im_2kw_tq_mode.py
@@ -29,7 +29,7 @@
     n_p=2, R_s=3.7, R_R=2.1, L_sgm=.021, L_M=.224)
 mdl_par = InductionMachinePars.from_inv_gamma_model_pars(par)
 machine = model.InductionMachine(mdl_par)
-# Use external speed w_M_t, defined subsequently below
+# Use externally specified actual speed w_M(t), defined subsequently below
 mechanics = model.ExternalRotorSpeed()
 converter = model.Inverter(u_dc=540)
 mdl = model.Drive(converter, machine, mechanics)