diff --git a/dev-ruby/histogram/histogram-0.2.4.1.ebuild b/dev-ruby/histogram/histogram-0.2.4.1.ebuild
index e32c7db3908d9..09c6f9f62f93d 100644
--- a/dev-ruby/histogram/histogram-0.2.4.1.ebuild
+++ b/dev-ruby/histogram/histogram-0.2.4.1.ebuild
@@ -17,3 +17,7 @@ LICENSE="MIT"
 SLOT="0"
 KEYWORDS="~amd64"
 IUSE=""
+
+all_ruby_prepare() {
+	sed -i -e '/simplecov/I s:^:#:' spec/spec_helper.rb || die
+}