diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index cae2d283a29..945edcb4994 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -46,6 +46,7 @@ https://github.com/elastic/beats/compare/v6.0.0-alpha1...master[Check the HEAD d
 - Fix panic when events were dropped by filters. {issue}4327[4327]
 - Add filtering to system filesystem metricset to remove relative mountpoints like those
   from Linux network namespaces. {pull}4370[4370]
+- Remove unnecessary print statement in schema apis {pull}4355[4355]
 
 *Packetbeat*
 
diff --git a/metricbeat/schema/mapstriface/mapstriface.go b/metricbeat/schema/mapstriface/mapstriface.go
index 403f318e2b0..504fc0719fd 100644
--- a/metricbeat/schema/mapstriface/mapstriface.go
+++ b/metricbeat/schema/mapstriface/mapstriface.go
@@ -128,8 +128,7 @@ func StrFromNum(key string, opts ...schema.SchemaOption) schema.Conv {
 func toStr(key string, data map[string]interface{}) (interface{}, error) {
 	emptyIface, err := common.MapStr(data).GetValue(key)
 	if err != nil {
-		fmt.Println(err)
-		return "", fmt.Errorf("Key %s not found", key)
+		return "", fmt.Errorf("Key %s not found: %s", key, err.Error())
 	}
 	str, ok := emptyIface.(string)
 	if !ok {