diff --git a/snudda/simulate/simulate.py b/snudda/simulate/simulate.py
index bc855f513..e7283b212 100644
--- a/snudda/simulate/simulate.py
+++ b/snudda/simulate/simulate.py
@@ -2061,7 +2061,7 @@ def run(self, t=None, hold_v=None):
             else:
                 t = 1000.0
 
-        self.sanity_check_play_vectors(sim_end_time=t)
+        self.sanity_check_play_vectors(sim_end_time=t*1e-3)
 
         if hold_v is None:
             if self.sim_info is not None and "hold_voltage" in self.sim_info: