diff --git a/engine/Quake/snd_fmod.c b/engine/Quake/snd_fmod.c
index 5fb9ca1..b9775a5 100644
--- a/engine/Quake/snd_fmod.c
+++ b/engine/Quake/snd_fmod.c
@@ -211,7 +211,8 @@ whereby sounds can have varying degrees of distance rolloff.
 static float F_CALL SND_FMOD_Attenuation(FMOD_CHANNELCONTROL *channelcontrol, float distance)
 {
 	FMOD_RESULT result;
-	soundslot_t *userdata;
+	void *userdata;
+	soundslot_t *soundslot;
 	float scale;
 
 	result = FMOD_Channel_GetUserData((FMOD_CHANNEL*)channelcontrol, &userdata);
@@ -221,7 +222,8 @@ static float F_CALL SND_FMOD_Attenuation(FMOD_CHANNELCONTROL *channelcontrol, fl
 		return 1.0f;
 	}
 
-	scale = 1.0f - (distance * userdata->dist_mult);
+	soundslot = (soundslot_t *)userdata;
+	scale = 1.0f - (distance * soundslot->dist_mult);
 	if (scale < 0.0f)
 		scale = 0.0f;
 
@@ -239,7 +241,8 @@ is properly cleared when the channel stops playing.
 static FMOD_RESULT F_CALL SND_FMOD_Callback(FMOD_CHANNELCONTROL *channelcontrol, FMOD_CHANNELCONTROL_TYPE controltype, FMOD_CHANNELCONTROL_CALLBACK_TYPE callbacktype, void *commanddata1, void *commanddata2)
 {
 	FMOD_RESULT result;
-	soundslot_t *userdata;
+	void *userdata;
+	soundslot_t *soundslot;
 
 	// We're only interested in notifications for when a channel is done playing a sound
 	if (controltype != FMOD_CHANNELCONTROL_CHANNEL || callbacktype != FMOD_CHANNELCONTROL_CALLBACK_END)
@@ -251,9 +254,10 @@ static FMOD_RESULT F_CALL SND_FMOD_Callback(FMOD_CHANNELCONTROL *channelcontrol,
 		return FMOD_OK;
 	}
 
-	if (userdata->zone)
+	soundslot = (soundslot_t *)userdata;
+	if (soundslot->zone)
 	{
-		Z_Free(userdata);
+		Z_Free(soundslot);
 	}
 
 	return FMOD_OK;