diff --git a/cs654/proj1/Makefile b/cs654/proj1/Makefile
index e8fdf29..df2be71 100644
--- a/cs654/proj1/Makefile
+++ b/cs654/proj1/Makefile
@@ -1,6 +1,8 @@
 
-all:
-	javac *.java
+all: *.class
+
+%.class: %.java
+	javac $^
 
 .PHONY: run
 run: