diff --git a/src/oplsynth/fmopl.cpp b/src/oplsynth/fmopl.cpp
index ea595c01a..1bfe1dd5f 100644
--- a/src/oplsynth/fmopl.cpp
+++ b/src/oplsynth/fmopl.cpp
@@ -1587,7 +1587,7 @@ public:
 		/* init global tables */
 		OPL_initalize(&Chip);
 
-		Chip.IsStereo = true;
+		Chip.IsStereo = stereo;
 
 		Reset();
 	}
diff --git a/src/oplsynth/music_opldumper_mididevice.cpp b/src/oplsynth/music_opldumper_mididevice.cpp
index bfd0f212d..f8fe6089f 100644
--- a/src/oplsynth/music_opldumper_mididevice.cpp
+++ b/src/oplsynth/music_opldumper_mididevice.cpp
@@ -189,7 +189,7 @@ int DiskWriterIO::OPLinit(uint numchips, bool dontcare)
 	CurChip = 0;
 	OPLchannels = OPL2CHANNELS * numchips;
 	OPLwriteInitState();
-	return 1;
+	return numchips;
 }
 
 //==========================================================================