diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 2dedd4245..18bc3d967 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -588,6 +588,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
       bool keyPriority=flags.getBool("keyPriority",true);
       bool no1EUpdate=flags.getBool("no1EUpdate",false);
       bool multiplyRel=flags.getBool("multiplyRel",false);
+      bool macroRace=flags.getBool("macroRace",false);
       int testAttack=flags.getInt("testAttack",0);
       int testDecay=flags.getInt("testDecay",0);
       int testSustain=flags.getInt("testSustain",0);
@@ -667,6 +668,10 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
         altered=true;
       }
 
+      if (ImGui::Checkbox("Cutoff macro race conditions (compatibility)",&macroRace)) {
+        altered=true;
+      }
+
 
       if (altered) {
         e->lockSave([&]() {
@@ -674,6 +679,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
           flags.set("keyPriority",keyPriority);
           flags.set("no1EUpdate",no1EUpdate);
           flags.set("multiplyRel",multiplyRel);
+          flags.set("macroRace",macroRace);
           flags.set("testAttack",testAttack);
           flags.set("testDecay",testDecay);
           flags.set("testSustain",testSustain);