diff --git a/src/synth/voice.c b/src/synth/voice.c
index d05a63e..ea0f9ff 100644
--- a/src/synth/voice.c
+++ b/src/synth/voice.c
@@ -40,6 +40,7 @@ void Voice_ModInit(voice_common_t *pCom)
 
 void Voice_ModFree(voice_common_t *pCom)
 {
+	(void)pCom;
 }
 
 void VoiceInit(voice_t *pObj, voice_common_t *pCom, UINT32 id, synth_float_t fs)