diff --git a/Source/Core/Core/DSP/DSPAccelerator.cpp b/Source/Core/Core/DSP/DSPAccelerator.cpp
index 1692e192fe..f6822ef2a8 100644
--- a/Source/Core/Core/DSP/DSPAccelerator.cpp
+++ b/Source/Core/Core/DSP/DSPAccelerator.cpp
@@ -208,6 +208,6 @@ void Accelerator::SetYn2(s16 yn2)
 
 void Accelerator::SetPredScale(u16 pred_scale)
 {
-  m_pred_scale = pred_scale;
+  m_pred_scale = pred_scale & 0x7f;
 }
 }  // namespace DSP