diff --git a/srsenb/src/stack/mac/sched_grid.cc b/srsenb/src/stack/mac/sched_grid.cc
index 126c11aab..0cbeeea4f 100644
--- a/srsenb/src/stack/mac/sched_grid.cc
+++ b/srsenb/src/stack/mac/sched_grid.cc
@@ -439,7 +439,7 @@ alloc_result sf_sched::alloc_rar(uint32_t aggr_lvl, const pending_rar_t& rar, rb
   rar_alloc.alloc_data.rbg_range = rbgs;
   rar_alloc.alloc_data.req_bytes = buf_rar;
   rar_allocs.push_back(rar_alloc);
-  last_msg3_prb += total_ul_nof_prbs * nof_grants;
+  last_msg3_prb += total_ul_nof_prbs;
 
   return ret;
 }