diff --git a/lib/puppet/provider/mongodb_database/mongodb.rb b/lib/puppet/provider/mongodb_database/mongodb.rb
index 895276b0a..9961bacc3 100644
--- a/lib/puppet/provider/mongodb_database/mongodb.rb
+++ b/lib/puppet/provider/mongodb_database/mongodb.rb
@@ -7,7 +7,7 @@
 
   def self.instances
     require 'json'
-    dbs = JSON.parse mongo_eval('printjson(db.getMongo().getDBs())')
+    dbs = JSON.parse mongo_eval('rs.slaveOk();printjson(db.getMongo().getDBs())')
 
     dbs['databases'].collect do |db|
       new(:name   => db['name'],
diff --git a/spec/unit/puppet/provider/mongodb_database/mongodb_spec.rb b/spec/unit/puppet/provider/mongodb_database/mongodb_spec.rb
index e8cfe9c8e..ebb5e58a8 100644
--- a/spec/unit/puppet/provider/mongodb_database/mongodb_spec.rb
+++ b/spec/unit/puppet/provider/mongodb_database/mongodb_spec.rb
@@ -36,7 +36,7 @@
     tmp = Tempfile.new('test')
     @mongodconffile = tmp.path
     allow(provider.class).to receive(:get_mongod_conf_file).and_return(@mongodconffile)
-    provider.class.stubs(:mongo_eval).with('printjson(db.getMongo().getDBs())').returns(raw_dbs)
+    provider.class.stubs(:mongo_eval).with('rs.slaveOk();printjson(db.getMongo().getDBs())').returns(raw_dbs)
     allow(provider.class).to receive(:db_ismaster).and_return(true)
   end