diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index fe420bd5..2b711238 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -677,7 +677,6 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
 
   reader.readS(); // format version. ignored.
   type=(DivInstrumentType)reader.readC();
-  mode=(type==DIV_INS_FM);
   reader.readC();
   name=reader.readString();
 
diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index 7a03e569..7afa9f93 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -550,7 +550,6 @@ struct DivInstrumentSNES {
 
 struct DivInstrument {
   String name;
-  bool mode;
   DivInstrumentType type;
   DivInstrumentFM fm;
   DivInstrumentSTD std;