diff --git a/util/ack/Makefile b/util/ack/Makefile
index 8d655401..b33790fd 100644
--- a/util/ack/Makefile
+++ b/util/ack/Makefile
@@ -16,9 +16,10 @@ BINDIR=../../bin
 head:   ack
 
 install:	ack
+		rm -f $(BINDIR)/ack
 		cp ack $(BINDIR)/ack
 		-cd $(BINDIR) ; \
-		for i in $(INTABLES) $(LNTABLES) ; do ln ack $$i ; done
+		for i in $(INTABLES) $(LNTABLES) ; do rm -f $$i ; ln ack $$i ; done
 		(cd pc ; make install )
 
 cmp:		ack
diff --git a/util/ack/pc/Makefile b/util/ack/pc/Makefile
index 4d4f340f..3d55256b 100644
--- a/util/ack/pc/Makefile
+++ b/util/ack/pc/Makefile
@@ -10,6 +10,7 @@ cmp:            em_pc
 		cmp em_pc $(PC_PATH)
 
 install:        em_pc
+		rm -f $(PC_PATH)
 		cp em_pc $(PC_PATH)
 
 lint: