diff --git a/gcc/Makefile b/gcc/Makefile
index 9756e90..dd869ba 100644
--- a/gcc/Makefile
+++ b/gcc/Makefile
@@ -22,7 +22,7 @@
 srcdir = .
 VPATH = $(srcdir)
 
-CC = gcc
+CC ?= gcc
 
 BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration