diff --git a/plugins/mongo/load_databases.js b/plugins/mongo/load_databases.js
new file mode 100644
index 00000000..75b79eda
--- /dev/null
+++ b/plugins/mongo/load_databases.js
@@ -0,0 +1,5 @@
+dbs = db.adminCommand( {listDatabases: 1} ).databases;
+
+for(var i = 0; i < dbs.length; i++) {
+	print(dbs[i].name);
+}
diff --git a/plugins/mongo/mongo.plugin.zsh b/plugins/mongo/mongo.plugin.zsh
new file mode 100644
index 00000000..7e6c58f0
--- /dev/null
+++ b/plugins/mongo/mongo.plugin.zsh
@@ -0,0 +1,6 @@
+_mongodbs() {
+	mypath=$(dirname $0)
+	compadd $(mongo --quiet $mypath/load_databases.js)
+}
+compdef _mongodbs mongo
+