diff --git a/dev-cpp/eigen/eigen-3.2.8.ebuild b/dev-cpp/eigen/eigen-3.2.8-r1.ebuild
similarity index 92%
rename from dev-cpp/eigen/eigen-3.2.8.ebuild
rename to dev-cpp/eigen/eigen-3.2.8-r1.ebuild
index f5b6212c1ecda..447ca29c55dfa 100644
--- a/dev-cpp/eigen/eigen-3.2.8.ebuild
+++ b/dev-cpp/eigen/eigen-3.2.8-r1.ebuild
@@ -32,10 +32,6 @@ src_prepare() {
 
 	sed -i -e "/Unknown build type/d" CMakeLists.txt || die
 
-	sed \
-		-e '/Cflags/s|:.*|: -I${CMAKE_INSTALL_PREFIX}/${INCLUDE_INSTALL_DIR}|g' \
-		-i eigen3.pc.in || die
-
 	cmake-utils_src_prepare
 }