diff --git a/mumax3c/drivers/relaxdriver.py b/mumax3c/drivers/relaxdriver.py
index cb893b3..bebc562 100644
--- a/mumax3c/drivers/relaxdriver.py
+++ b/mumax3c/drivers/relaxdriver.py
@@ -51,8 +51,6 @@ def _checkargs(self, **kwargs):
 
     def _check_system(self, system):
         """Checks the system has dynamics in it"""
-        if len(system.dynamics) == 0:
-            raise RuntimeError("System's dynamics is not defined")
         if len(system.energy) == 0:
             raise RuntimeError("System's energy is not defined")