diff --git a/soc/arm/Kconfig b/soc/arm/Kconfig
index 9a7c5e2f3d1..4707dce3db6 100644
--- a/soc/arm/Kconfig
+++ b/soc/arm/Kconfig
@@ -21,6 +21,16 @@ config CPU_HAS_ARM_SAU
 	help
 	  MCU implements the ARM Security Attribution Unit (SAU).
 
+config CPU_HAS_NRF_IDAU
+	bool
+	# Omit prompt to signify "hidden" option
+	depends on SOC_SERIES_NRF91X
+	select CPU_HAS_TEE
+	help
+	  MCU implements the nRF (vendor-specific) Security Attribution Unit.
+	  (IDAU: "Implementation-Defined Attribution Unit", in accordance with
+	  ARM terminology).
+
 config HAS_SWO
 	bool
 	# Omit prompt to signify "hidden" option