diff --git a/Makefile b/Makefile
index 02a5a3f..a4d8a12 100644
--- a/Makefile
+++ b/Makefile
@@ -2,18 +2,19 @@ PREFIX=/usr
 
 .PHONY: main test install uninstall clean
 
+CFLAGS := -Wall
 SRCFILES := $(shell find . -type f -name "*.c")
 OBJFILES := $(patsubst %.c, %.o, $(SRCFILES))
 
 
 iast: main.o $(OBJFILES)
-	$(CC) $^ -o $@
+	$(CC) $^ -o $@ $(CFLAGS)
 
 test: iast
 	sh tests/test.sh
 
 %.o: %.c
-	$(CC) -MMD -MP -c $< -o $@
+	$(CC) -MMD -MP -c $< -o $@ $(CFLAGS)
 
 install:
 	install -m 0755 iast $(PREFIX)/bin