diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6dd5b0af65..10f0a01cf9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -106,6 +106,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/foundation) [\#712](https://github.com/line/lbm-sdk/pull/712) fix x/foundation EndBlocker
 * (baseapp) [\#724](https://github.com/line/lbm-sdk/pull/724) add checking pubkey type from validator params
 * (x/staking) [\#726](https://github.com/line/lbm-sdk/pull/726) check allowedList size in StakeAuthorization.Accept()
+* (x/staking) [\#728](https://github.com/line/lbm-sdk/pull/728) fix typo in unbondingToUnbonded() panic
 * (x/foundation) [\#732](https://github.com/line/lbm-sdk/pull/732) add verification on accounts into x/foundation Grants cli
 
 ### Breaking Changes
diff --git a/x/staking/keeper/val_state_change.go b/x/staking/keeper/val_state_change.go
index bc8b6cbcb6..1a6ced8914 100644
--- a/x/staking/keeper/val_state_change.go
+++ b/x/staking/keeper/val_state_change.go
@@ -249,7 +249,7 @@ func (k Keeper) unbondedToBonded(ctx sdk.Context, validator types.Validator) (ty
 // UnbondingToUnbonded switches a validator from unbonding state to unbonded state
 func (k Keeper) UnbondingToUnbonded(ctx sdk.Context, validator types.Validator) types.Validator {
 	if !validator.IsUnbonding() {
-		panic(fmt.Sprintf("bad state transition unbondingToBonded, validator: %v\n", validator))
+		panic(fmt.Sprintf("bad state transition unbondingToUnbonded, validator: %v\n", validator))
 	}
 
 	return k.completeUnbondingValidator(ctx, validator)
diff --git a/x/staking/keeper/val_state_change_test.go b/x/staking/keeper/val_state_change_test.go
new file mode 100644
index 0000000000..5abed36e23
--- /dev/null
+++ b/x/staking/keeper/val_state_change_test.go
@@ -0,0 +1,30 @@
+package keeper_test
+
+import (
+	"github.com/line/lbm-sdk/x/staking/keeper"
+	"github.com/line/lbm-sdk/x/staking/types"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestUnbondingToUnbondedPanic(t *testing.T) {
+	app, ctx, _, _, validators := initValidators(t, 100, 2, []int64{0, 100})
+
+	for i, validator := range validators {
+		validators[i] = keeper.TestingUpdateValidator(app.StakingKeeper, ctx, validator, false)
+	}
+
+	assert.Equal(t, validators[0].Status, types.Unbonded)
+	assert.Equal(t, validators[1].Status, types.Bonded)
+
+	// unbond validator which is in unbonded status
+	require.Panics(t, func() {
+		app.StakingKeeper.UnbondingToUnbonded(ctx, validators[0])
+	})
+
+	// unbond validator which is in bonded status
+	require.Panics(t, func() {
+		app.StakingKeeper.UnbondingToUnbonded(ctx, validators[1])
+	})
+}