diff --git a/arch/arm/Kbuild b/arch/arm/Kbuild
index 8f12275bac1..2f267e3378b 100644
--- a/arch/arm/Kbuild
+++ b/arch/arm/Kbuild
@@ -1,4 +1,2 @@
-obj-y = core/
-
-obj-$(CONFIG_PLATFORM_FSL_FRDM_K64F) += platforms/fsl_frdm_k64f/
-obj-$(CONFIG_PLATFORM_TI_LM3S6965) += platforms/ti_lm3s6965/
+obj-y += core/
+obj-y += platforms/$(subst $(DQUOTE),,$(CONFIG_PLATFORM))/