diff --git a/internal/views/templates/index.html b/internal/views/templates/index.html
index c9df700..ccf597e 100644
--- a/internal/views/templates/index.html
+++ b/internal/views/templates/index.html
@@ -7,6 +7,7 @@
       <input type="text" name="q" id="q" placeholder="Search…" autocomplete="off" autofocus
         hx-get="/search" hx-target="#results" hx-trigger="keyup changed delay:500ms" hx-include="this">
       <button type="submit">Search</button>
+      <input type="hidden" name="engines" id="engines-input" value="">
     </form>
     <div id="autocomplete-dropdown"></div>
   </div>
diff --git a/internal/views/templates/results.html b/internal/views/templates/results.html
index 9cd20be..2a795c3 100644
--- a/internal/views/templates/results.html
+++ b/internal/views/templates/results.html
@@ -5,6 +5,7 @@
     <input type="text" name="q" id="q" value="{{.Query}}" autocomplete="off"
       hx-get="/search" hx-target="#results" hx-trigger="keyup changed delay:500ms" hx-include="this">
     <button type="submit">Search</button>
+    <input type="hidden" name="engines" id="engines-input" value="">
   </form>
 </div>