diff --git a/lib/core/lua-5.3.4/Makefile b/lib/core/lua-5.3.4/Makefile
index 4935306..676f93d 100644
--- a/lib/core/lua-5.3.4/Makefile
+++ b/lib/core/lua-5.3.4/Makefile
@@ -6,7 +6,7 @@
 # Your platform. See PLATS for possible values.
 PLAT= none
 
-CC= gcc -std=gnu99
+CC?= gcc -std=gnu99
 CFLAGS= -O2 -g -Wall -Wextra -DLUA_COMPAT_5_2 -fPIC $(SYSCFLAGS) $(MYCFLAGS)
 LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
 LIBS= -lm $(SYSLIBS) $(MYLIBS)