diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp_defconfig b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp_defconfig
index e1ba596d135..565ad7b1467 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp_defconfig
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp_defconfig
@@ -26,3 +26,5 @@ CONFIG_EXTERNAL_CACHE=y
 
 # Enable GPIO
 CONFIG_GPIO=y
+
+CONFIG_MAX_THREAD_BYTES=3
diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad_defconfig b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad_defconfig
index 27df01dee12..4cdd5dc1148 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad_defconfig
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad_defconfig
@@ -23,3 +23,5 @@ CONFIG_NULL_POINTER_EXCEPTION_DETECTION_NONE=y
 # Enable cache
 CONFIG_CACHE_MANAGEMENT=y
 CONFIG_EXTERNAL_CACHE=y
+
+CONFIG_MAX_THREAD_BYTES=3