diff --git a/Changes b/Changes
index ddc87c38..abb81426 100644
--- a/Changes
+++ b/Changes
@@ -6,6 +6,10 @@
   * #410 improvements to Undiscovered Neighbors report
   * device port search will match on Description as well as Port
 
+  [BUG FIXES]
+
+  * #414 clicking discover button with empty field causes crash
+
 2.039028 - 2018-05-05
 
   [BUG FIXES]
diff --git a/lib/App/Netdisco/Web/AdminTask.pm b/lib/App/Netdisco/Web/AdminTask.pm
index 944a5f48..7826a6f4 100644
--- a/lib/App/Netdisco/Web/AdminTask.pm
+++ b/lib/App/Netdisco/Web/AdminTask.pm
@@ -16,7 +16,7 @@ sub add_job {
     return if
       ($device and (!$net or $net->num == 0 or $net->addr eq '0.0.0.0'));
 
-    my @hostlist = defined $device ? ($net->hostenum) : (undef);
+    my @hostlist = $device ? ($net->hostenum) : (undef);
 
     jq_insert([map {{
       ($_ ? (device => $_->addr) : ()),