diff --git a/LEGO1/lego/legoomni/include/legocachsound.h b/LEGO1/lego/legoomni/include/legocachsound.h
index a60e4acd..b7096533 100644
--- a/LEGO1/lego/legoomni/include/legocachsound.h
+++ b/LEGO1/lego/legoomni/include/legocachsound.h
@@ -49,8 +49,8 @@ class LegoCacheSound : public MxCore {
 	void SetDistance(MxS32 p_min, MxS32 p_max);
 	void MuteSilence(MxBool p_muted);
 	void MuteStop(MxBool p_mute);
-	MxResult GetFrequency(MxULong* p_freq);
-	MxResult SetFrequency(MxULong p_freq);
+	MxResult GetFrequency(LPDWORD p_freq);
+	MxResult SetFrequency(DWORD p_freq);
 	LegoCacheSound& operator=(LegoCacheSound& p_sound);
 	void CopyFrom(LegoCacheSound& p_sound);
 
diff --git a/LEGO1/lego/legoomni/src/audio/legocachsound.cpp b/LEGO1/lego/legoomni/src/audio/legocachsound.cpp
index 8ccd00c1..2798369b 100644
--- a/LEGO1/lego/legoomni/src/audio/legocachsound.cpp
+++ b/LEGO1/lego/legoomni/src/audio/legocachsound.cpp
@@ -318,13 +318,13 @@ void LegoCacheSound::MuteStop(MxBool p_muted)
 }
 
 // FUNCTION: BETA10 0x10066f4d
-MxResult LegoCacheSound::GetFrequency(MxULong* p_freq)
+MxResult LegoCacheSound::GetFrequency(LPDWORD p_freq)
 {
 	return m_dsBuffer->GetFrequency(p_freq);
 }
 
 // FUNCTION: BETA10 0x10066f7b
-MxResult LegoCacheSound::SetFrequency(MxULong p_freq)
+MxResult LegoCacheSound::SetFrequency(DWORD p_freq)
 {
 	return m_dsBuffer->SetFrequency(p_freq);
 }