diff --git a/database.go b/database.go
index 45560ed..547e367 100644
--- a/database.go
+++ b/database.go
@@ -25,11 +25,6 @@ func newDatabaseService(url string, currency string) *DatabaseService {
 	}
 }
 
-// ReqRelease serves release request
-type ReqRelease struct {
-	CurrAbbr string
-}
-
 // Release serves relesase response from discogs
 type Release struct {
 	Title             string         `json:"title"`
@@ -70,7 +65,7 @@ type Release struct {
 // Release returns release by release's ID
 func (s *DatabaseService) Release(releaseID int) (*Release, error) {
 	params := url.Values{}
-	params.Set("CurrAbbr", s.currency)
+	params.Set("curr_abbr", s.currency)
 
 	var release *Release
 	if err := request(s.url+releasesURI+strconv.Itoa(releaseID), params, &release); err != nil {
diff --git a/errors.go b/errors.go
index 00a2fea..d87b663 100644
--- a/errors.go
+++ b/errors.go
@@ -11,7 +11,7 @@ type Error struct {
 }
 
 func (e *Error) Error() string {
-	return fmt.Sprintf("%s", strings.ToLower(e.Message))
+	return fmt.Sprintf("discogs error: %s", strings.ToLower(e.Message))
 }
 
 // APIErrors