diff --git a/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpuapp.overlay b/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
index 4c23931e04f1..46a4b9640a1c 100644
--- a/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
+++ b/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
@@ -48,4 +48,5 @@
 	status = "okay";
 	etrsources = <(NRF_TDDCONF_SOURCE_STMMAINCORE | NRF_TDDCONF_SOURCE_STMPPR)>;
 	portconfig = <0>;
+	etrbuffer = <&etr_buffer>;
 };
diff --git a/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpurad.overlay b/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpurad.overlay
index 9d296906f576..cf78cac0cb0e 100644
--- a/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpurad.overlay
+++ b/samples/benchmarks/coremark/boards/nrf54h20dk_nrf54h20_cpurad.overlay
@@ -53,5 +53,4 @@
 &tddconf {
 	status = "okay";
 	etrsources = <(NRF_TDDCONF_SOURCE_STMMAINCORE)>;
-	portconfig = <0>;
 };