diff --git a/Source/Plugins/Plugin_DSP_HLE/Src/UCodes/UCode_Zelda_Voice.cpp b/Source/Plugins/Plugin_DSP_HLE/Src/UCodes/UCode_Zelda_Voice.cpp
index 8e87b0de19..319ed3b2ef 100644
--- a/Source/Plugins/Plugin_DSP_HLE/Src/UCodes/UCode_Zelda_Voice.cpp
+++ b/Source/Plugins/Plugin_DSP_HLE/Src/UCodes/UCode_Zelda_Voice.cpp
@@ -279,6 +279,7 @@ void CUCode_Zelda::MixAddVoice(ZeldaVoicePB &PB, s32* _LeftBuffer, s32* _RightBu
 		switch (PB.Format)
 		{
 		case 0x0005:		// AFC / unknown
+		case 0x0021:		// AFC / ADPCM???
 		case 0x0009:		// AFC / ADPCM
 			MixAddVoice_AFC(PB, m_TempBuffer, _Size);
 			break;