diff --git a/app-misc/vittk/vittk-1.3.ebuild b/app-misc/vittk/vittk-1.3.ebuild
index c94575dfa89cf..bc1c47519edbc 100644
--- a/app-misc/vittk/vittk-1.3.ebuild
+++ b/app-misc/vittk/vittk-1.3.ebuild
@@ -28,5 +28,7 @@ PATCHES=(
 
 src_prepare() {
 	default
+
+	mv configure.{in,ac} || die
 	eautoreconf
 }