1 files changed, 1 insertions, 0 deletions
diff --git a/alc/alu.cpp b/alc/alu.cpp
index 4a0ea8f9..a7d7cd70 100644
--- a/alc/alu.cpp
+++ b/alc/alu.cpp
@@ -159,6 +159,7 @@ void ALCdevice::ProcessHrtf(const ALsizei SamplesToDo)
     const int ridx{RealOut.ChannelIndex[FrontRight]};
     ASSUME(lidx >= 0 && ridx >= 0);
 
+    ASSUME(SamplesToDo >= 0);
     MixDirectHrtf(RealOut.Buffer[lidx], RealOut.Buffer[ridx], Dry.Buffer, HrtfAccumData,
         mHrtfState.get(), SamplesToDo);
 }