diff --git a/toyota_prius_2017_can1.dbc b/toyota_prius_2017_can1.dbc
index 14eae07..f5e2c9e 100644
--- a/toyota_prius_2017_can1.dbc
+++ b/toyota_prius_2017_can1.dbc
@@ -53,7 +53,7 @@ BO_ 170 WHEEL_SPEEDS: 8 XXX
 BO_ 180 SPEED: 8 XXX
  SG_ ENCODER : 39|8@0+ (1,0) [0|255] "" XXX
  SG_ CHECKSUM : 63|8@0+ (1,0) [0|255] "" XXX
- SG_ SPEED : 47|16@0+ (1,0) [0|65535] "" XXX
+ SG_ SPEED : 47|16@0+ (0.01,0) [0|250] "kph" XXX
 
 BO_ 295 GEAR_PACKET: 8 XXX
  SG_ CAR_MOVEMENT : 39|8@0- (1,0) [0|255] "" XXX