diff --git a/common/sound_api.h b/common/sound_api.h
index 77d6e58a..d25c18be 100644
--- a/common/sound_api.h
+++ b/common/sound_api.h
@@ -162,8 +162,8 @@ typedef struct snd_globals_s
 // API from engine to client (client calls these)
 typedef struct sound_api_s
 {
-	qboolean      (*CL_GetEntitySpatialization)( struct channel_s *ch );
-	struct sfx_s* (*S_GetSfxByHandle)( sound_t handle );
+	qboolean (*CL_GetEntitySpatialization)( channel_t *ch );
+	sfx_t*   (*S_GetSfxByHandle)( sound_t handle );
 } sound_api_t;
 
 // Callbacks from client to engine (engine calls these when custom sound is active)
diff --git a/engine/cdll_exp.h b/engine/cdll_exp.h
index 3751b7e1..0cd04636 100644
--- a/engine/cdll_exp.h
+++ b/engine/cdll_exp.h
@@ -81,7 +81,7 @@ typedef struct cldll_func_s
 	void (*pfnMoveEvent)( float forwardmove, float sidemove );
 	void (*pfnLookEvent)( float relyaw, float relpitch );
 	// Sound API
-	int (*pfnGetSoundInterface)( int version, sound_api_t *api, sound_interface_t *callback );
+	int (*pfnGetSoundInterface)( int version, const sound_api_t *api, sound_interface_t *callback );
 } cldll_func_t;
 
 #endif//CDLL_EXP_H
diff --git a/engine/client/s_main.c b/engine/client/s_main.c
index 349b8392..a4e38723 100644
--- a/engine/client/s_main.c
+++ b/engine/client/s_main.c
@@ -1935,7 +1935,7 @@ static void S_VoiceRecordStop_f( void )
 	Voice_RecordStop();
 }
 
-static const sound_api_t s_clientSoundAPI = {
+static const sound_api_t gSoundAPI = {
 	CL_GetEntitySpatialization,
 	S_GetSfxByHandle,
 };
@@ -1952,7 +1952,7 @@ static qboolean S_InitSoundAPI( void )
 
 	if( clgame.dllFuncs.pfnGetSoundInterface )
 	{
-		if( clgame.dllFuncs.pfnGetSoundInterface( CL_SOUND_INTERFACE_VERSION, &s_clientSoundAPI, &clgame.soundFuncs ))
+		if( clgame.dllFuncs.pfnGetSoundInterface( CL_SOUND_INTERFACE_VERSION, &gSoundAPI, &clgame.soundFuncs ))
 		{
 			Con_Reportf( "%s: ^2initailized extended SoundAPI ^7ver. %i\n", __func__, CL_SOUND_INTERFACE_VERSION );
 			return true;