diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index b002afb9c..7c3aec199 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -4496,6 +4496,7 @@ bool FurnaceGUI::loop() {
         sysAddOption(DIV_SYSTEM_AY8910);
         sysAddOption(DIV_SYSTEM_AMIGA);
         sysAddOption(DIV_SYSTEM_OPLL);
+        sysAddOption(DIV_SYSTEM_OPLL_DRUMS);
         sysAddOption(DIV_SYSTEM_VRC7);
         sysAddOption(DIV_SYSTEM_TIA);
         sysAddOption(DIV_SYSTEM_SAA1099);
@@ -4766,6 +4767,7 @@ bool FurnaceGUI::loop() {
             sysChangeOption(i,DIV_SYSTEM_AY8910);
             sysChangeOption(i,DIV_SYSTEM_AMIGA);
             sysChangeOption(i,DIV_SYSTEM_OPLL);
+            sysChangeOption(i,DIV_SYSTEM_OPLL_DRUMS);
             sysChangeOption(i,DIV_SYSTEM_VRC7);
             sysChangeOption(i,DIV_SYSTEM_TIA);
             sysChangeOption(i,DIV_SYSTEM_SAA1099);