diff --git a/aes/host/Makefile b/aes/host/Makefile
index 4b444d8..9a9c4ba 100644
--- a/aes/host/Makefile
+++ b/aes/host/Makefile
@@ -1,10 +1,10 @@
-CC      = $(CROSS_COMPILE)gcc
-LD      = $(CROSS_COMPILE)ld
-AR      = $(CROSS_COMPILE)ar
-NM      = $(CROSS_COMPILE)nm
-OBJCOPY = $(CROSS_COMPILE)objcopy
-OBJDUMP = $(CROSS_COMPILE)objdump
-READELF = $(CROSS_COMPILE)readelf
+CC      ?= $(CROSS_COMPILE)gcc
+LD      ?= $(CROSS_COMPILE)ld
+AR      ?= $(CROSS_COMPILE)ar
+NM      ?= $(CROSS_COMPILE)nm
+OBJCOPY ?= $(CROSS_COMPILE)objcopy
+OBJDUMP ?= $(CROSS_COMPILE)objdump
+READELF ?= $(CROSS_COMPILE)readelf
 
 OBJS = main.o