diff --git a/middleware/basic_auth.go b/middleware/basic_auth.go
index 97c3ae9c..c1f34c8f 100644
--- a/middleware/basic_auth.go
+++ b/middleware/basic_auth.go
@@ -23,7 +23,7 @@ type (
 	}
 
 	// BasicAuthValidator defines a function to validate BasicAuth credentials.
-	BasicAuthValidator func(string, string, echo.Context) (error, bool)
+	BasicAuthValidator func(string, string, echo.Context) (bool, error)
 )
 
 const (
@@ -81,7 +81,7 @@ func BasicAuthWithConfig(config BasicAuthConfig) echo.MiddlewareFunc {
 				for i := 0; i < len(cred); i++ {
 					if cred[i] == ':' {
 						// Verify credentials
-						err, valid := config.Validator(cred[:i], cred[i+1:], c)
+						valid, err := config.Validator(cred[:i], cred[i+1:], c)
 						if err != nil {
 							return err
 						} else if valid {
diff --git a/middleware/basic_auth_test.go b/middleware/basic_auth_test.go
index 0e854e85..7a65b2a5 100644
--- a/middleware/basic_auth_test.go
+++ b/middleware/basic_auth_test.go
@@ -15,11 +15,11 @@ func TestBasicAuth(t *testing.T) {
 	req := httptest.NewRequest(echo.GET, "/", nil)
 	res := httptest.NewRecorder()
 	c := e.NewContext(req, res)
-	f := func(u, p string, c echo.Context) (error, bool) {
+	f := func(u, p string, c echo.Context) (bool, error) {
 		if u == "joe" && p == "secret" {
-			return nil, true
+			return true, nil
 		}
-		return nil, false
+		return false, nil
 	}
 	h := BasicAuth(f)(func(c echo.Context) error {
 		return c.String(http.StatusOK, "test")
diff --git a/middleware/key_auth.go b/middleware/key_auth.go
index 25189c95..5ef87e3d 100644
--- a/middleware/key_auth.go
+++ b/middleware/key_auth.go
@@ -32,7 +32,7 @@ type (
 	}
 
 	// KeyAuthValidator defines a function to validate KeyAuth credentials.
-	KeyAuthValidator func(string, echo.Context) (error, bool)
+	KeyAuthValidator func(string, echo.Context) (bool, error)
 
 	keyExtractor func(echo.Context) (string, error)
 )
@@ -94,7 +94,7 @@ func KeyAuthWithConfig(config KeyAuthConfig) echo.MiddlewareFunc {
 			if err != nil {
 				return echo.NewHTTPError(http.StatusBadRequest, err.Error())
 			}
-			err, valid := config.Validator(key, c)
+			valid, err := config.Validator(key, c)
 			if err != nil {
 				return err
 			} else if valid {
diff --git a/middleware/key_auth_test.go b/middleware/key_auth_test.go
index edbe92f8..bf36006f 100644
--- a/middleware/key_auth_test.go
+++ b/middleware/key_auth_test.go
@@ -15,8 +15,8 @@ func TestKeyAuth(t *testing.T) {
 	res := httptest.NewRecorder()
 	c := e.NewContext(req, res)
 	config := KeyAuthConfig{
-		Validator: func(key string, c echo.Context) (error, bool) {
-			return nil, key == "valid-key"
+		Validator: func(key string, c echo.Context) (bool, error) {
+			return key == "valid-key", nil
 		},
 	}
 	h := KeyAuthWithConfig(config)(func(c echo.Context) error {