diff --git a/vm/actor/src/builtin/miner/mod.rs b/vm/actor/src/builtin/miner/mod.rs
index be59d3491b80..cd6dc57af497 100644
--- a/vm/actor/src/builtin/miner/mod.rs
+++ b/vm/actor/src/builtin/miner/mod.rs
@@ -2652,7 +2652,9 @@ impl Actor {
                     rt.curr_epoch(),
                     &rt.current_balance()?,
                 )
-                .map_err(|e| actor_error!(ErrIllegalState, "failed to repay penalty: {}", e))?;
+                .map_err(|e| {
+                    e.downcast_default(ExitCode::ErrIllegalState, "failed to repay penalty")
+                })?;
             pledge_delta_total -= &penalty_from_vesting;
             let to_burn = penalty_from_vesting + penalty_from_balance;
             Ok((pledge_delta_total, to_burn))
@@ -3053,7 +3055,9 @@ where
                     rt.curr_epoch(),
                     &rt.current_balance()?,
                 )
-                .map_err(|e| actor_error!(ErrIllegalState, "failed to repay penalty: {}", e))?;
+                .map_err(|e| {
+                    e.downcast_default(ExitCode::ErrIllegalState, "failed to repay penalty")
+                })?;
 
             penalty = &penalty_from_vesting + penalty_from_balance;
             pledge_delta -= penalty_from_vesting;
@@ -3156,7 +3160,9 @@ where
                 rt.curr_epoch(),
                 &rt.current_balance()?,
             )
-            .map_err(|e| actor_error!(ErrIllegalState, "failed to unlock penalty: {}", e))?;
+            .map_err(|e| {
+                e.downcast_default(ExitCode::ErrIllegalState, "failed to unlock penalty")
+            })?;
 
         penalty_total = &penalty_from_vesting + penalty_from_balance;
         pledge_delta_total -= penalty_from_vesting;