diff --git a/libdsl/Makefile b/libdsl/Makefile
index 5c8a3cedc..f5b5abefc 100644
--- a/libdsl/Makefile
+++ b/libdsl/Makefile
@@ -24,8 +24,8 @@ include $(INCLUDE_DIR)/package.mk
 
 ifeq ($(CONFIG_TARGET_brcmbca),y)
   TARGET_PLATFORM=BROADCOM
-  CHIP_ID=$(patsubst "%",%,$(CONFIG_BCM_CHIP_ID))
-  TARGET_CFLAGS +=-DIOPSYS_BROADCOM -DCHIP_$(CHIP_ID) -DCONFIG_BCM9$(CHIP_ID) \
+  CHIP_ID=$(subst BCM,,$(call toupper,$(patsubst "%",%,$(CONFIG_TARGET_SUBTARGET))))
+  TARGET_CFLAGS +=-DIOPSYS_BROADCOM -DCHIP_$(CHIP_ID) -DCONFIG_BCM$(CHIP_ID) \
 	-I$(STAGING_DIR)/usr/include/bcm963xx/bcmdrivers/opensource/include/bcm963xx \
 	-I$(STAGING_DIR)/usr/include/bcm963xx/userspace/public/include
 else ifeq ($(CONFIG_TARGET_x86),y)