diff --git a/src/engine/fileOpsIns.cpp b/src/engine/fileOpsIns.cpp
index 7f9559b3a..6a181f5f2 100644
--- a/src/engine/fileOpsIns.cpp
+++ b/src/engine/fileOpsIns.cpp
@@ -1897,7 +1897,7 @@ std::vector<DivInstrument*> DivEngine::instrumentFromFile(const char* path, bool
   bool isOldFurnaceIns=false;
   try {
     reader.read(magic,4);
-    if (memcmp("FINS",magic,4)==0) {
+    if (memcmp("FINS",magic,4)==0 || memcmp("FINB",magic,4)==0) {
       isFurnaceInstr=true;
       logV("found a new Furnace ins");
     } else {
diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index 6225765aa..ba99b28f4 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -3005,6 +3005,8 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version, DivS
     type=1;
   } else if (memcmp(magic,"FINS",4)==0) {
     type=2;
+  } else if (memcmp(magic,"FINB",4)==0) { // DIV_FUR_VARIANT_B
+    type=2;
   } else {
     logE("invalid instrument header!");
     return DIV_DATA_INVALID_HEADER;