diff --git a/examples/democoin/mock/validator.go b/examples/democoin/mock/validator.go
index 84d41d4880..c3d01b1703 100644
--- a/examples/democoin/mock/validator.go
+++ b/examples/democoin/mock/validator.go
@@ -28,6 +28,11 @@ func (v Validator) GetPubKey() crypto.PubKey {
 	return nil
 }
 
+// Implements sdk.Validator
+func (v Validator) GetTokens() sdk.Rat {
+	return sdk.ZeroRat()
+}
+
 // Implements sdk.Validator
 func (v Validator) GetPower() sdk.Rat {
 	return v.Power
diff --git a/x/stake/simulation/msgs.go b/x/stake/simulation/msgs.go
index 597046107c..41bda5dd6f 100644
--- a/x/stake/simulation/msgs.go
+++ b/x/stake/simulation/msgs.go
@@ -32,7 +32,7 @@ func SimulateMsgCreateValidator(m auth.AccountMapper, k stake.Keeper) simulation
 			amount = sdk.NewInt(int64(r.Intn(int(amount.Int64()))))
 		}
 		if amount.Equal(sdk.ZeroInt()) {
-			return "nop", nil
+			return "no-operation", nil
 		}
 		msg := stake.MsgCreateValidator{
 			Description:   description,
@@ -95,7 +95,7 @@ func SimulateMsgDelegate(m auth.AccountMapper, k stake.Keeper) simulation.TestAn
 			amount = sdk.NewInt(int64(r.Intn(int(amount.Int64()))))
 		}
 		if amount.Equal(sdk.ZeroInt()) {
-			return "nop", nil
+			return "no-operation", nil
 		}
 		msg := stake.MsgDelegate{
 			DelegatorAddr: delegatorAddress,
@@ -127,7 +127,7 @@ func SimulateMsgBeginUnbonding(m auth.AccountMapper, k stake.Keeper) simulation.
 			amount = sdk.NewInt(int64(r.Intn(int(amount.Int64()))))
 		}
 		if amount.Equal(sdk.ZeroInt()) {
-			return "nop", nil
+			return "no-operation", nil
 		}
 		msg := stake.MsgBeginUnbonding{
 			DelegatorAddr: delegatorAddress,
@@ -185,7 +185,7 @@ func SimulateMsgBeginRedelegate(m auth.AccountMapper, k stake.Keeper) simulation
 			amount = sdk.NewInt(int64(r.Intn(int(amount.Int64()))))
 		}
 		if amount.Equal(sdk.ZeroInt()) {
-			return "nop", nil
+			return "no-operation", nil
 		}
 		msg := stake.MsgBeginRedelegate{
 			DelegatorAddr:    delegatorAddress,