diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 18fcc7a124..c815ad461a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1062,6 +1062,7 @@ config ARCH_U8500
 	imply PL01X_SERIAL
 	imply PMIC_AB8500
 	imply RTC_PL031
+	imply SYS_THUMB_BUILD
 	imply SYSRESET_SYSCON
 
 config ARCH_VERSAL