diff --git a/baseapp/params.go b/baseapp/params.go
index f7d8d1c0a1c..7b3ec6ff7d2 100644
--- a/baseapp/params.go
+++ b/baseapp/params.go
@@ -64,7 +64,7 @@ func ValidateEvidenceParams(i interface{}) error {
 	}
 
 	if v.MaxNum <= 0 {
-		return fmt.Errorf("evidence maximum number of evidence must be positive: %v", v.MaxAgeDuration)
+		return fmt.Errorf("evidence maximum number of evidence must be positive: %v", v.MaxNum)
 	}
 
 	return nil
diff --git a/simapp/test_helpers.go b/simapp/test_helpers.go
index 31fed4c9964..136fde760e4 100644
--- a/simapp/test_helpers.go
+++ b/simapp/test_helpers.go
@@ -38,6 +38,7 @@ var DefaultConsensusParams = &abci.ConsensusParams{
 	Evidence: &tmproto.EvidenceParams{
 		MaxAgeNumBlocks: 302400,
 		MaxAgeDuration:  504 * time.Hour, // 3 weeks is the max duration
+		MaxNum:          50,
 	},
 	Validator: &tmproto.ValidatorParams{
 		PubKeyTypes: []string{