diff --git a/opus-1.1.ebuild b/opus-1.1.ebuild
index 5042322..8d1f90f 100644
--- a/opus-1.1.ebuild
+++ b/opus-1.1.ebuild
@@ -33,6 +33,11 @@ DEPEND="doc? ( app-doc/doxygen )"
 
 S=${WORKDIR}/${MY_P}
 
+src_prepare() {
+	epatch "${FILESDIR}/1.1-fix-configure.ac-shell-bug.patch"
+	eautoreconf
+}
+
 src_configure() {
 	local myeconfargs=(
 		$(use_enable custom-modes)