diff --git a/lib/puppet/provider/gnupg_key/gnupg.rb b/lib/puppet/provider/gnupg_key/gnupg.rb
index 887e549..a92f2a8 100644
--- a/lib/puppet/provider/gnupg_key/gnupg.rb
+++ b/lib/puppet/provider/gnupg_key/gnupg.rb
@@ -53,7 +53,7 @@ def add_key
   end
 
   def add_key_from_key_server
-    if resource[:proxy].empty?
+    if resource[:proxy].nil? or resource[:proxy].empty?
       command = "gpg --keyserver #{resource[:key_server]} --recv-keys #{resource[:key_id]}"
     else
       command = "gpg --keyserver #{resource[:key_server]} --keyserver-options http-proxy=#{resource[:proxy]} --recv-keys #{resource[:key_id]}"