diff --git a/dev-python/bottleneck/bottleneck-1.3.5.ebuild b/dev-python/bottleneck/bottleneck-1.3.5-r1.ebuild
similarity index 83%
rename from dev-python/bottleneck/bottleneck-1.3.5.ebuild
rename to dev-python/bottleneck/bottleneck-1.3.5-r1.ebuild
index d1a52a75700de..9f919ab05ef53 100644
--- a/dev-python/bottleneck/bottleneck-1.3.5.ebuild
+++ b/dev-python/bottleneck/bottleneck-1.3.5-r1.ebuild
@@ -31,6 +31,13 @@ DEPEND="
 
 distutils_enable_tests pytest
 
+src_prepare() {
+	# don't overwrites user's optimization level
+	sed -e '/extra_compile_args=\["-O2"\]/d' -i setup.py || die
+
+	distutils-r1_src_prepare
+}
+
 python_test() {
 	cd "${BUILD_DIR}/install$(python_get_sitedir)" || die
 	epytest