diff --git a/server/services/sensor_values_service.go b/server/services/sensor_values_service.go
index 9e6bd91..1036ce7 100644
--- a/server/services/sensor_values_service.go
+++ b/server/services/sensor_values_service.go
@@ -54,7 +54,7 @@ func (s *SensorValuesService) GetList(sensor string, from int64, to int64) ([]se
 func (s *SensorValuesService) GetLatest(sensor string, to int64) (*sensorValue, error) {
 	var value = sensorValue{}
 
-	row := s.ctx.DB.QueryRow("SELECT timestamp, value FROM sensor_values WHERE sensor = ? timestamp < ? ORDER BY timestamp DESC LIMIT 1", sensor, to)
+	row := s.ctx.DB.QueryRow("SELECT timestamp, value FROM sensor_values WHERE sensor = ? AND timestamp < ? ORDER BY timestamp DESC LIMIT 1", sensor, to)
 
 	err := row.Scan(&value.Timestamp, &value.Value)
 	if err != nil {