diff --git a/param/errors.go b/param/errors.go
index 64011e7..e6b9de6 100644
--- a/param/errors.go
+++ b/param/errors.go
@@ -63,8 +63,8 @@ func (n NestingError) Error() string {
 type SyntaxErrorSubtype int
 
 const (
-	MissingOpeningBrace SyntaxErrorSubtype = iota + 1
-	MissingClosingBrace
+	MissingOpeningBracket SyntaxErrorSubtype = iota + 1
+	MissingClosingBracket
 )
 
 // SyntaxError is an error type returned when a key is incorrectly formatted.
@@ -83,11 +83,11 @@ func (s SyntaxError) Error() string {
 		s.Key)
 
 	switch s.Subtype {
-	case MissingOpeningBrace:
-		return prefix + fmt.Sprintf("expected opening brace, got %q",
+	case MissingOpeningBracket:
+		return prefix + fmt.Sprintf("expected opening bracket, got %q",
 			s.ErrorPart)
-	case MissingClosingBrace:
-		return prefix + fmt.Sprintf("expected closing brace in %q",
+	case MissingClosingBracket:
+		return prefix + fmt.Sprintf("expected closing bracket in %q",
 			s.ErrorPart)
 	default:
 		panic("switch is not exhaustive!")
diff --git a/param/parse.go b/param/parse.go
index 1213d8c..b8c069d 100644
--- a/param/parse.go
+++ b/param/parse.go
@@ -80,7 +80,7 @@ func keyed(tipe reflect.Type, key, keytail string) (string, string) {
 	if keytail[0] != '[' {
 		panic(SyntaxError{
 			Key:       kpath(key, keytail),
-			Subtype:   MissingOpeningBrace,
+			Subtype:   MissingOpeningBracket,
 			ErrorPart: keytail,
 		})
 	}
@@ -89,7 +89,7 @@ func keyed(tipe reflect.Type, key, keytail string) (string, string) {
 	if idx == -1 {
 		panic(SyntaxError{
 			Key:       kpath(key, keytail),
-			Subtype:   MissingClosingBrace,
+			Subtype:   MissingClosingBracket,
 			ErrorPart: keytail[1:],
 		})
 	}