diff --git a/lib/db.js b/lib/db.js
index e237340..e89928e 100644
--- a/lib/db.js
+++ b/lib/db.js
@@ -54,10 +54,9 @@ exports.initializeDatabase = function() {
                     // if (blockedData.hosts.length  row['count(*)'])
                     for (let host of blockedData.hosts) {
                         db.get("select hostname from blocked_hosts where hostname = ?", [host], (err, row) => {
-                            if (err !== null) {
-                                db.run("insert into blocked_hosts (hostname) values (?)", [hostname]);
+                            if (row === undefined) {
+                                db.run("insert into blocked_hosts (hostname) values (?)", [host]);
                             }
-                            // TODO -- run a diff for whatever has been deleted from the config file. 
                         })
                     }
                 })