diff --git a/examples/platforms/efr32mg12/radio.c b/examples/platforms/efr32mg12/radio.c
index 48aa066ab..d37dc5717 100644
--- a/examples/platforms/efr32mg12/radio.c
+++ b/examples/platforms/efr32mg12/radio.c
@@ -140,7 +140,7 @@ static const RAIL_IEEE802154_Config_t sRailIeee802154Config = {
     .ackConfig =
         {
             .enable     = true,
-            .ackTimeout = 894,
+            .ackTimeout = 864,
             .rxTransitions =
                 {
                     .success = RAIL_RF_STATE_RX,