This disclosure refers to a dosing mechanism for use in a drug delivery device implementing a dialing mode and a dispensing mode, wherein the dosing mechanism comprises a dose button, a housing and a determination unit. The dose button is activatable by the user for dose dispense, causing displacement of an indicating element connected to the housing from a first position to a second position. The determination unit is adapted such that it detects the indicating element in its second position and thereby determines that the dosing mechanism is in the dispensing mode. With some embodiments, it is possible to distinguish between the dialing mode and the dispensing mode. Some embodiments further refer to a drug delivery device comprising the above dosing mechanism.