diff --git a/net-libs/libtorrent/files/libtorrent-0.15.5-find_grep.patch b/net-libs/libtorrent/files/libtorrent-0.15.5-find_grep.patch
new file mode 100644
index 0000000000000..039d57231c131
--- /dev/null
+++ b/net-libs/libtorrent/files/libtorrent-0.15.5-find_grep.patch
@@ -0,0 +1,14 @@
+https://github.com/rakshasa/libtorrent/pull/539.patch
+configure fails with slibtool because it doesn't define GREP
+diff --git a/scripts/common.m4 b/scripts/common.m4
+index 480bdef..7129204 100644
+--- a/scripts/common.m4
++++ b/scripts/common.m4
+@@ -23,6 +23,7 @@ AC_DEFUN([TORRENT_WITH_SYSROOT], [
+ 
+ AC_DEFUN([TORRENT_REMOVE_UNWANTED],
+ [
++  AC_REQUIRE([AC_PROG_GREP])
+   values_to_check=`for i in $2; do echo $i; done`
+   unwanted_values=`for i in $3; do echo $i; done`
+   if test -z "${unwanted_values}"; then
diff --git a/net-libs/libtorrent/libtorrent-0.15.5.ebuild b/net-libs/libtorrent/libtorrent-0.15.5.ebuild
index c4c97036b6339..6f74e0f201b88 100644
--- a/net-libs/libtorrent/libtorrent-0.15.5.ebuild
+++ b/net-libs/libtorrent/libtorrent-0.15.5.ebuild
@@ -33,6 +33,8 @@ BDEPEND="
 PATCHES=(
 	"${FILESDIR}"/${PN}-0.14.0-tests-address.patch
 	"${FILESDIR}"/${PN}-0.15.3-unbundle_udns.patch
+	# https://github.com/rakshasa/libtorrent/pull/539.patch
+	"${FILESDIR}"/${PN}-0.15.5-find_grep.patch
 )
 
 src_prepare() {