The invention relates to a method for loading a program module (L1, L2, L3) in a terminal, in which one or several programs (A, B) are running, and in which method subroutines (P1, P2, P3) are stored in said program modules (L1, L2, L3). The program modules (L1, L2, L3) are provided with first tags (T1, T2, T3), wherein to start binding, the program makes a call (7) to a subroutine (P1, P2, P3). The call (7) is supplemented with the first tags (T1, T2, T3) to select the program module (L1, L2, L3) for binding, in which the called subroutine (P1, P2, P3) is stored. The tags (T1, T2, T3) are supplemented with second tags (LT1, LT2, LT3). The call (7) is also supplemented with said second call data (PKx, PKy, PKz). In connection with the binding, said first tags (T1, T2, T3) stored in the program modules are compared with the first tags (T1, T2, T3) transmitted in the call (7), and the second tags (LT1, LT2, LT3) are compared with the second call data (PKx, PKy, PKz) transmitted in the call (7), wherein the program module to be bound is selected to be the program module which matches with the first tags (T1, T2, T3) and the second call data (PKx, PKy, PKz) transmitted in the call. The invention also relates to a terminal (MT).