diff --git a/models/LIFACnoise.py b/models/LIFACnoise.py
index cbc3f08..b96417a 100644
--- a/models/LIFACnoise.py
+++ b/models/LIFACnoise.py
@@ -299,7 +299,7 @@ def simulate_fast(rectified_stimulus_array, total_time_s, parameters: np.ndarray
 
         if output_voltage[i] > threshold:
             output_voltage[i] = v_base
-            spiketimes.append(i * step_size)
+            spiketimes.append((i * step_size) + time_start)
             adaption[i] += delta_a / tau_a
 
     return output_voltage, adaption, spiketimes, input_voltage