diff --git a/openair1/PHY/NR_TRANSPORT/nr_prach.c b/openair1/PHY/NR_TRANSPORT/nr_prach.c
index dc3cb1950d..efcc3dae1b 100644
--- a/openair1/PHY/NR_TRANSPORT/nr_prach.c
+++ b/openair1/PHY/NR_TRANSPORT/nr_prach.c
@@ -34,7 +34,8 @@ static bool drop_old_prach(const void *data, void *user)
 {
   const prach_item_t *p = data;
   const fsn_t *now = user;
-  const fsn_t t = {p->frame, p->slot, now->mu};
+  // account for long PRACH over more than 1 slot
+  const fsn_t t = {p->frame, p->slot + p->num_slots - 1, now->mu};
   bool drop = fsn_in_the_past(t, *now);
   if (drop)
     LOG_E(NR_PHY, "%4d.%2d PRACH job is in the past (%4d.%2d)\n", now->f, now->s, t.f, t.s);
@@ -45,7 +46,8 @@ static bool get_current_prach(const void *data, void *user)
 {
   const prach_item_t *p = data;
   const fsn_t *now = user;
-  const fsn_t t = {p->frame, p->slot, now->mu};
+  // account for long PRACH over more than 1 slot
+  const fsn_t t = {p->frame, p->slot + p->num_slots - 1, now->mu};
   return fsn_equal(t, *now);
 }