diff --git a/dsn.go b/dsn.go
index c49827f5d..8c6b778e8 100644
--- a/dsn.go
+++ b/dsn.go
@@ -288,12 +288,17 @@ func ParseDSN(dsn string) (cfg *Config, err error) {
 					if dsn[j] == '@' {
 						// username[:password]
 						// Find the first ':' in dsn[:j]
-						for k = 0; k < j; k++ {
+						for k = j - 1; k >= 0; k-- {
 							if dsn[k] == ':' {
 								cfg.Passwd = dsn[k+1 : j]
 								break
 							}
 						}
+
+						// no ':' in dsn[:j]
+						if k < 0 {
+							k = j
+						}
 						cfg.User = dsn[:k]
 
 						break
diff --git a/dsn_test.go b/dsn_test.go
index 4fd76b813..41e514b36 100644
--- a/dsn_test.go
+++ b/dsn_test.go
@@ -23,6 +23,9 @@ var testDSNs = []struct {
 }{{
 	"username:password@protocol(address)/dbname?param=value",
 	&Config{User: "username", Passwd: "password", Net: "protocol", Addr: "address", DBName: "dbname", Params: map[string]string{"param": "value"}, Collation: "utf8_general_ci", Loc: time.UTC},
+}, {
+	"user:name:password@protocol(address)/dbname?param=value",
+	&Config{User: "user:name", Passwd: "password", Net: "protocol", Addr: "address", DBName: "dbname", Params: map[string]string{"param": "value"}, Collation: "utf8_general_ci", Loc: time.UTC},
 }, {
 	"username:password@protocol(address)/dbname?param=value&columnsWithAlias=true",
 	&Config{User: "username", Passwd: "password", Net: "protocol", Addr: "address", DBName: "dbname", Params: map[string]string{"param": "value"}, Collation: "utf8_general_ci", Loc: time.UTC, ColumnsWithAlias: true},