diff --git a/src/oplsynth/opl_mus_player.cpp b/src/oplsynth/opl_mus_player.cpp
index 43a129b14..319eb8319 100644
--- a/src/oplsynth/opl_mus_player.cpp
+++ b/src/oplsynth/opl_mus_player.cpp
@@ -267,7 +267,7 @@ bool OPLmusicBlock::ServiceStream (void *buff, int numbytes)
 					{
 						for (i = 0; i < io->NumChips; ++i)
 						{
-							io->chips[i]->Update(samples1, samplesleft);
+							io->chips[i]->Update(samples1, numsamples);
 						}
 						OffsetSamples(samples1, numsamples << stereoshift);
 					}