diff --git a/home/michal/Plocha/gprs_sgsn_before_patch.c b/home/michal/Plocha/gp
index 753d85f..f637a82 100644
--- a/home/michal/Plocha/gprs_sgsn_before_patch.c
+++ b/home/michal/Plocha/gprs_sgsn_patch.c
@@ -361,7 +361,7 @@ uint32_t sgsn_alloc_ptmsi(void)
        uint32_t ptmsi;
 
 restart:
-       ptmsi = rand();
+       ptmsi = rand() | 0xc0000000; //because of GPRS IMSI ATTACH
        llist_for_each_entry(mm, &sgsn_mm_ctxts, list) {
                if (mm->p_tmsi == ptmsi)
                        goto restart;