diff --git a/.gitmodules b/.gitmodules
index b8c560d..f305711 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -328,3 +328,6 @@
 [submodule "ruby-ddplugin"]
 	path = ruby-ddplugin
 	url = ssh://aur@aur.archlinux.org/ruby-ddplugin.git
+[submodule "ruby-slow_enumerator_tools"]
+	path = ruby-slow_enumerator_tools
+	url = ssh://aur@aur.archlinux.org/ruby-slow_enumerator_tools.git
diff --git a/ruby-slow_enumerator_tools b/ruby-slow_enumerator_tools
new file mode 160000
index 0000000..e951e27
--- /dev/null
+++ b/ruby-slow_enumerator_tools
@@ -0,0 +1 @@
+Subproject commit e951e2785807a8be276c25e41cc1d2c4646c494c