diff --git a/pkg/emscripten/proto.html b/pkg/emscripten/proto.html
index bf00847c13..79f6c472c2 100644
--- a/pkg/emscripten/proto.html
+++ b/pkg/emscripten/proto.html
@@ -66,6 +66,7 @@
                           <a class="dropdown-item" href="." onclick=switchCore("mednafen_snes")>Mednafen/Beetle SNES</a>
                           <a class="dropdown-item" href="." onclick=switchCore("mednafen_vb")>Mednafen/Beetle Virtual Boy</a>
                           <a class="dropdown-item" href="." onclick=switchCore("mednafen_wswan")>Mednafen/Beetle WonderSwan</a>
+                          <a class="dropdown-item" href="." onclick=switchCore("mupen64plus")>Mupen64 Plus</a>
                           <a class="dropdown-item" href="." onclick=switchCore("nestopia")>Nestopia</a>
                           <a class="dropdown-item" href="." onclick=switchCore("nxengine")>NX Engine</a>
                           <a class="dropdown-item" href="." onclick=switchCore("o2em")>O2em</a>