diff --git a/cleanenv.go b/cleanenv.go
index a7dc346..0bca32b 100644
--- a/cleanenv.go
+++ b/cleanenv.go
@@ -249,7 +249,7 @@ type structMeta struct {
 	description string
 	updatable   bool
 	required    bool
-	path        []string
+	path        string
 }
 
 // isFieldValueZero determines if fieldValue empty or not
@@ -303,10 +303,10 @@ func readStructMetadata(cfgRoot interface{}) ([]structMeta, error) {
 	type cfgNode struct {
 		Val    interface{}
 		Prefix string
-		Path   []string
+		Path   string
 	}
 
-	cfgStack := []cfgNode{{cfgRoot, "", nil}}
+	cfgStack := []cfgNode{{cfgRoot, "", ""}}
 	metas := make([]structMeta, 0)
 
 	for i := 0; i < len(cfgStack); i++ {
@@ -347,7 +347,7 @@ func readStructMetadata(cfgRoot interface{}) ([]structMeta, error) {
 					cfgStack = append(cfgStack, cfgNode{
 						Val:    fld.Addr().Interface(),
 						Prefix: sPrefix + prefix,
-						Path:   append(cfgStack[i].Path, fType.Name),
+						Path:   fmt.Sprintf("%s%s.", cfgStack[i].Path, fType.Name),
 					})
 					continue
 				}
diff --git a/cleanenv_test.go b/cleanenv_test.go
index ad32d4d..67f7b64 100644
--- a/cleanenv_test.go
+++ b/cleanenv_test.go
@@ -333,6 +333,9 @@ func TestReadEnvErrors(t *testing.T) {
 			Host string        `env:"HOST" env-required:"true"`
 			TTL  time.Duration `env:"TTL"`
 		} `env-prefix:"TEST_ERRORS_DATABASE_"`
+		ThirdStruct struct {
+			Host string `env:"HOST"`
+		} `env-prefix:"TEST_ERRORS_THIRD_"`
 	}
 
 	tests := []struct {
@@ -348,7 +351,7 @@ func TestReadEnvErrors(t *testing.T) {
 			cfg:     &testEnvErrors{},
 			errorAs: RequireError{},
 			errorWant: RequireError{
-				FieldPath: []string{"Database"},
+				FieldPath: "Database.",
 				FieldName: "Host",
 				EnvName:   "TEST_ERRORS_DATABASE_HOST",
 			},
@@ -364,6 +367,7 @@ func TestReadEnvErrors(t *testing.T) {
 			errorWant: ParsingError{
 				Err:       fmt.Errorf("time: invalid duration \"bad-value\""),
 				FieldName: "TTL",
+				FieldPath: "Database.",
 				EnvName:   "TEST_ERRORS_DATABASE_TTL",
 			},
 		},
diff --git a/errors.go b/errors.go
index c072be2..ada6b5c 100644
--- a/errors.go
+++ b/errors.go
@@ -2,16 +2,15 @@ package cleanenv
 
 import (
 	"fmt"
-	"strings"
 )
 
 type RequireError struct {
 	FieldName string
-	FieldPath []string
+	FieldPath string
 	EnvName   string
 }
 
-func newRequireError(fieldName string, fieldPath []string, envName string) RequireError {
+func newRequireError(fieldName string, fieldPath string, envName string) RequireError {
 	return RequireError{
 		FieldName: fieldName,
 		FieldPath: fieldPath,
@@ -22,18 +21,18 @@ func newRequireError(fieldName string, fieldPath []string, envName string) Requi
 func (r RequireError) Error() string {
 	return fmt.Sprintf(
 		"field %q is required but the value is not provided",
-		strings.Join(append(r.FieldPath, r.FieldName), "."),
+		r.FieldPath+r.FieldName,
 	)
 }
 
 type ParsingError struct {
 	Err       error
 	FieldName string
-	FieldPath []string
+	FieldPath string
 	EnvName   string
 }
 
-func newParsingError(fieldName string, fieldPath []string, envName string, err error) ParsingError {
+func newParsingError(fieldName string, fieldPath string, envName string, err error) ParsingError {
 	return ParsingError{
 		FieldName: fieldName,
 		FieldPath: fieldPath,
@@ -44,8 +43,8 @@ func newParsingError(fieldName string, fieldPath []string, envName string, err e
 
 func (p ParsingError) Error() string {
 	return fmt.Sprintf(
-		"parsing field %v env %v: %v",
-		strings.Join(append(p.FieldPath, p.FieldName), "."),
+		"parsing field %q env %q: %v",
+		p.FieldPath+p.FieldName,
 		p.EnvName,
 		p.Err,
 	)