diff --git a/modules/trusted-firmware-m/Kconfig.tfm.defconfig b/modules/trusted-firmware-m/Kconfig.tfm.defconfig
index edbe52602cf1..af290301f317 100644
--- a/modules/trusted-firmware-m/Kconfig.tfm.defconfig
+++ b/modules/trusted-firmware-m/Kconfig.tfm.defconfig
@@ -15,9 +15,6 @@ config TFM_BOARD
 
 if BUILD_WITH_TFM
 
-config TFM_ISOLATION_LEVEL
-	default 1 if SOC_FAMILY_NORDIC_NRF
-
 config TFM_BL2
 	bool
 	default n