diff --git a/ChangeLog b/ChangeLog
index 128d13e3c..628d7e92c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-08-12  Grégoire Sutre  <gregoire.sutre@gmail.com>
+
+	* autogen.sh: Replace find -not by the POSIX-compliant find !.
+
 2013-08-12  Grégoire Sutre  <gregoire.sutre@gmail.com>
 
 	Prevent shadowing of stdlib's devname(3) on BSD.
diff --git a/autogen.sh b/autogen.sh
index d63a79a22..466a42b24 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -6,8 +6,8 @@ export LC_CTYPE=C
 export LC_COLLATE=C
 unset LC_ALL
 
-find . -iname '*.[ch]' -not -ipath './grub-core/lib/libgcrypt-grub/*' -not -ipath './build-aux/*' -not -ipath './grub-core/lib/libgcrypt/src/misc.c' -not -ipath './grub-core/lib/libgcrypt/src/global.c' -not -ipath './grub-core/lib/libgcrypt/src/secmem.c' |sort > po/POTFILES.in
-find util -iname '*.in' -not -name Makefile.in  |sort > po/POTFILES-shell.in
+find . -iname '*.[ch]' ! -ipath './grub-core/lib/libgcrypt-grub/*' ! -ipath './build-aux/*' ! -ipath './grub-core/lib/libgcrypt/src/misc.c' ! -ipath './grub-core/lib/libgcrypt/src/global.c' ! -ipath './grub-core/lib/libgcrypt/src/secmem.c' |sort > po/POTFILES.in
+find util -iname '*.in' ! -name Makefile.in  |sort > po/POTFILES-shell.in
 
 autogen --version >/dev/null || exit 1