diff --git a/Makefile b/Makefile
index ec93166..55c71ce 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+CFLAGS ?=
+
 all:
 	mkdir -p bin/
-	$(CC) -o bin/foxpc -O2 -Wall -Wextra -Wpedantic -std=c99 src/*.c
+	$(CC) -o bin/foxpc -O2 -Wall -Wextra -Wpedantic -std=c99 $(CFLAGS) src/*.c