diff --git a/rubygem-bundler.spec b/rubygem-bundler.spec
index fc21f12..859bfde 100644
--- a/rubygem-bundler.spec
+++ b/rubygem-bundler.spec
@@ -142,7 +142,7 @@ touch %{_builddir}/rubygems/rubygems/defaults/operating_system.rb
 
 # It is necessary to require spec_helper.rb explicitly.
 # https://github.com/bundler/bundler/pull/5634
-RUBYOPT=-I%{_builddir}/rubygems GEM_PATH=/usr/share/gems rspec -rspec_helper spec -f d
+RUBYOPT=-I%{_builddir}/rubygems GEM_PATH=%{gem_dir} rspec -rspec_helper spec -f d
 
 %endif