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-rw-r--r--scumm/instrument.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/scumm/instrument.cpp b/scumm/instrument.cpp
index f334a2fd0b..575dcf75a5 100644
--- a/scumm/instrument.cpp
+++ b/scumm/instrument.cpp
@@ -433,7 +433,7 @@ void Instrument_Roland::send (MidiChannel *mc) {
byte checksum = 0;
byte *ptr = (byte *) &_instrument + 4;
int i;
- for (i = 4; i < sizeof (_instrument) - 1; ++i)
+ for (i = 4; i < (int)sizeof (_instrument) - 1; ++i)
checksum -= *ptr++;
_instrument.checksum = checksum & 0x7F;