diff --git a/configs/gnupg/gpg.conf b/configs/gnupg/gpg.conf
index 61c0350..23b5b2f 100644
--- a/configs/gnupg/gpg.conf
+++ b/configs/gnupg/gpg.conf
@@ -45,6 +45,7 @@ use-agent
 
 # This is the server that --recv-keys, --send-keys, and --search-keys will
 # communicate with to receive keys from, send keys to, and search for keys on
+# Needs gnupg-curl, on Debian-based systems: sudo apt-get install gnupg-curl
 keyserver hkps://hkps.pool.sks-keyservers.net
 
 # Provide a certificate store to override the system default