diff --git a/mscgen-0.20.ebuild b/mscgen-0.20.ebuild
index 6ff6ee2..fed7d0a 100644
--- a/mscgen-0.20.ebuild
+++ b/mscgen-0.20.ebuild
@@ -38,6 +38,7 @@ src_configure() {
 	fi
 
 	econf \
-		--docdir=/usr/share/doc/${PF} \
+		--docdir=${EPREFIX}/usr/share/doc/${PF} \
+		--prefix=${EPREFIX}/usr \
 		${myconf}
 }