diff --git a/bioptim/limits/objective_functions.py b/bioptim/limits/objective_functions.py
index d4d44a09a..2cbd7c8ef 100644
--- a/bioptim/limits/objective_functions.py
+++ b/bioptim/limits/objective_functions.py
@@ -416,6 +416,7 @@ def get_type() -> Callable
         TRACK_POWER = (PenaltyFunctionAbstract.Functions.minimize_power,)
         TRACK_SEGMENT_WITH_CUSTOM_RT = (PenaltyFunctionAbstract.Functions.track_segment_with_custom_rt,)
         TRACK_STATE = (PenaltyFunctionAbstract.Functions.minimize_states,)
+        MINIMIZE_CONTACT_FORCES = (PenaltyFunctionAbstract.Functions.minimize_contact_forces,)
         MINIMIZE_CONTACT_FORCES_END_OF_INTERVAL = (
             PenaltyFunctionAbstract.Functions.minimize_contact_forces_end_of_interval,
         )