diff --git a/src/engine/engine.h b/src/engine/engine.h
index e5088d620..879603b40 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -54,8 +54,8 @@ class DivWorkPool;
 
 #define DIV_UNSTABLE
 
-#define DIV_VERSION "dev193"
-#define DIV_ENGINE_VERSION 193
+#define DIV_VERSION "dev194"
+#define DIV_ENGINE_VERSION 194
 // for imports
 #define DIV_VERSION_MOD 0xff01
 #define DIV_VERSION_FC 0xff02
diff --git a/src/engine/fileOps/fur.cpp b/src/engine/fileOps/fur.cpp
index 82054dd6c..a90643c15 100644
--- a/src/engine/fileOps/fur.cpp
+++ b/src/engine/fileOps/fur.cpp
@@ -2052,6 +2052,18 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       }
     }
 
+    // OPLL fixedAll compat
+    if (ds.version<194) {
+      for (int i=0; i<ds.systemLen; i++) {
+        if (ds.system[i]==DIV_SYSTEM_OPLL ||
+            ds.system[i]==DIV_SYSTEM_OPLL_DRUMS) {
+          if (!ds.systemFlags[i].has("fixedAll")) {
+            ds.systemFlags[i].set("fixedAll",false);
+          }
+        }
+      }
+    }
+
     if (active) quitDispatch();
     BUSY_BEGIN_SOFT;
     saveLock.lock();
diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index 262f55d78..d1195b9e4 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -1099,7 +1099,7 @@ void DivPlatformOPLL::setFlags(const DivConfig& flags) {
     oscBuf[i]->rate=rate/2;
   }
   noTopHatFreq=flags.getBool("noTopHatFreq",false);
-  fixedAll=flags.getBool("fixedAll",false);
+  fixedAll=flags.getBool("fixedAll",true);
 }
 
 int DivPlatformOPLL::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index be0609c98..73f05ec74 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -396,7 +396,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
       int clockSel=flags.getInt("clockSel",0);
       int patchSet=flags.getInt("patchSet",0);
       bool noTopHatFreq=flags.getBool("noTopHatFreq",false);
-      bool fixedAll=flags.getBool("fixedAll",false);
+      bool fixedAll=flags.getBool("fixedAll",true);
 
       ImGui::Text("Clock rate:");
       ImGui::Indent();