diff --git a/lib/App/Netdisco/Util/Snapshot.pm b/lib/App/Netdisco/Util/Snapshot.pm
index aee9944a..641f76b1 100644
--- a/lib/App/Netdisco/Util/Snapshot.pm
+++ b/lib/App/Netdisco/Util/Snapshot.pm
@@ -135,7 +135,7 @@ sub snmpwalk_to_cache {
           else {
               # on rare occasions a vendor returns .0 and .something
               delete $leaves{$key}
-                if defined $leaves{$key} and ref q{} eq $leaves{$key};
+                if defined $leaves{$key} and ref q{} eq ref $leaves{$key};
               $leaves{$key}->{$idx} = $oids{$orig_oid};
           }