A method in a wireless terminal operating in a 3GPP wireless communications network for controlling using MPTCP with a WLAN network, The method comprises receiving from the 3GPP wireless communications network system information comprising a condition for MPTCP with a WLAN network, the condition being associated with mobility characteristics of the wireless terminal. The method further comprises determining a parameter indicative of mobility characteristics of the wireless terminal and disabling MPTCP with a WLAN network if the parameter indicative of mobility characteristics indicates that mobility of the wireless terminal is at or above a value defined in the condition.