diff --git a/protobuf_definitions/aquatroll.proto b/protobuf_definitions/aquatroll.proto
index 9f1def55..a01e11f9 100644
--- a/protobuf_definitions/aquatroll.proto
+++ b/protobuf_definitions/aquatroll.proto
@@ -264,6 +264,7 @@ enum AquaTrollSensor {
   AQUA_TROLL_SENSOR_CHLOROPHYLL_A_SENSOR = 62;
   AQUA_TROLL_SENSOR_BLUE_GREEN_ALGAE_PHYCOCYANIN_SENSOR = 64;
   AQUA_TROLL_SENSOR_BLUE_GREEN_ALGAE_PHYCOERYTHRIN_SENSOR = 65;
+  AQUA_TROLL_SENSOR_CRUDE_OIL_SENSOR = 67;
   AQUA_TROLL_SENSOR_NITRATE_ISE_SENSOR = 70;
   AQUA_TROLL_SENSOR_AMMONIUM_ISE_SENSOR = 71;
   AQUA_TROLL_SENSOR_CHLORIDE_ISE_SENSOR = 72;