diff --git a/openair1/SIMULATION/NR_PHY/dlsim.c b/openair1/SIMULATION/NR_PHY/dlsim.c
index 828ff176ec..b44c3b3e50 100644
--- a/openair1/SIMULATION/NR_PHY/dlsim.c
+++ b/openair1/SIMULATION/NR_PHY/dlsim.c
@@ -701,6 +701,8 @@ printf("%d\n", slot);
                                 .minRXTXTIME = 6,
                                 .do_CSIRS = 0,
                                 .do_SRS = 0,
+                                .num_dlharq = 16,
+                                .num_ulharq = 16,
                                 .maxMIMO_layers = g_nrOfLayers,
                                 .force_256qam_off = false,
                                 .timer_config.sr_ProhibitTimer = 0,
diff --git a/openair1/SIMULATION/NR_PHY/ulsim.c b/openair1/SIMULATION/NR_PHY/ulsim.c
index 647456d8d6..e94b12408d 100644
--- a/openair1/SIMULATION/NR_PHY/ulsim.c
+++ b/openair1/SIMULATION/NR_PHY/ulsim.c
@@ -658,6 +658,8 @@ int main(int argc, char *argv[])
                                 .minRXTXTIME = 0,
                                 .do_CSIRS = 0,
                                 .do_SRS = 0,
+                                .num_dlharq = 16,
+                                .num_ulharq = 16,
                                 .force_256qam_off = false,
                                 .timer_config.sr_ProhibitTimer = 0,
                                 .timer_config.sr_TransMax = 64,