diff --git a/Chapter 11/makefile b/Chapter 11/makefile
index cf36905..bcff346 100644
--- a/Chapter 11/makefile	
+++ b/Chapter 11/makefile	
@@ -6,13 +6,10 @@ DEBUGFLGS =
 endif
 LSTFLGS =
 
-LDFLAGS = -lSystem -lc -e main -arch arm64
+LDFLAGS = -lc -e main -arch arm64
 
 all: divexamp mulexamp matrixmult
 
-%.o : %.s
-	as $(DEBUGFLGS) $(LSTFLGS) $< -o $@
-
 divexamp: divexamp.s debug.s
 	clang $(LDFLAGS) -o divexamp divexamp.s
 
@@ -22,4 +19,5 @@ mulexamp: mulexamp.s debug.s
 matrixmult: matrixmult.s
 	clang $(LDFLAGS) -g -o matrixmult matrixmult.s
 
-
+clean: 
+	rm -rf divexamp matrixmult mulexamp
\ No newline at end of file