diff --git a/static/shared/header/header.tmpl b/static/shared/header/header.tmpl
index 83dc942..e4b9d8d 100644
--- a/static/shared/header/header.tmpl
+++ b/static/shared/header/header.tmpl
@@ -88,6 +88,7 @@
         autocapitalize="off" autocomplete="off" autocorrect="off" spellcheck="false"
         {{- if .Experiments.IsActive "symbol-search" -}} placeholder="Search packages or symbols"
         {{- else -}} placeholder="Search for a package"{{- end -}} value="{{.Query}}" />
+    <input name="m" value="{{.SearchMode}}" hidden>
     <button class="go-Button go-Button--inverted" aria-label="Submit search">
       <img
         class="go-Icon"