diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -1087,6 +1087,7 @@ STR_CONFIG_SETTING_ROAD_VEHICLE_ACCELERA
 STR_CONFIG_SETTING_ROAD_VEHICLE_ACCELERATION_MODEL_ORIGINAL     :Original
 STR_CONFIG_SETTING_ROAD_VEHICLE_ACCELERATION_MODEL_REALISTIC    :Realistic
 STR_CONFIG_SETTING_TRAIN_SLOPE_STEEPNESS                        :{LTBLUE}Slope steepness for trains {ORANGE}{STRING1}%
+STR_CONFIG_SETTING_ROAD_VEHICLE_SLOPE_STEEPNESS                 :{LTBLUE}Slope steepness for road vehicles {ORANGE}{STRING1}%
 STR_CONFIG_SETTING_FORBID_90_DEG                                :{LTBLUE}Forbid trains and ships to make 90 deg turns: {ORANGE}{STRING1} {LTBLUE} (not with OPF)
 STR_CONFIG_SETTING_JOINSTATIONS                                 :{LTBLUE}Join train stations built next to each other: {ORANGE}{STRING1}
 STR_CONFIG_SETTING_DISTANT_JOIN_STATIONS                        :{LTBLUE}Allow to join stations not directly adjacent: {ORANGE}{STRING1}