diff --git a/pcpostprocess/subtraction_plots.py b/pcpostprocess/subtraction_plots.py
index 2f90141..2341076 100644
--- a/pcpostprocess/subtraction_plots.py
+++ b/pcpostprocess/subtraction_plots.py
@@ -58,7 +58,7 @@ def do_subtraction_plot(fig, times, sweeps, before_currents, after_currents,
                                            *ramp_bounds)
         all_leak_params_before.append(before_params)
 
-        after_params, _ = fit_linear_leak(before_currents, voltages, times,
+        after_params, _ = fit_linear_leak(after_currents, voltages, times,
                                           *ramp_bounds)
         all_leak_params_after.append(after_params)