diff --git a/LDP/guide/docbook/lkmpg-2.6/lkmpg-examples/02-HelloWorld/Makefile b/LDP/guide/docbook/lkmpg-2.6/lkmpg-examples/02-HelloWorld/Makefile
index f31fb3c4..dd1bfd7b 100644
--- a/LDP/guide/docbook/lkmpg-2.6/lkmpg-examples/02-HelloWorld/Makefile
+++ b/LDP/guide/docbook/lkmpg-2.6/lkmpg-examples/02-HelloWorld/Makefile
@@ -7,7 +7,7 @@ obj-m += startstop.o
 startstop-objs := start.o stop.o
 
 all:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+	make -C /lib/modules/$(shell uname -r)/build M=$(shell pwd) modules
 
 clean:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
+	make -C /lib/modules/$(shell uname -r)/build M=$(shell pwd) clean