diff --git a/nx_main/main.c b/nx_main/main.c
index e686924..1f39232 100644
--- a/nx_main/main.c
+++ b/nx_main/main.c
@@ -13,8 +13,8 @@ u64 g_tickdiff_frame=0;
 #endif
 
 #ifdef ENABLE_AUDIO
-void audio_initialize();
-void audio_exit();
+void audio_initialize(void);
+void audio_exit(void);
 #endif
 
 int main(int argc, char **argv)
diff --git a/nx_main/nx_audio.c b/nx_main/nx_audio.c
index 775a8dc..74f9262 100644
--- a/nx_main/nx_audio.c
+++ b/nx_main/nx_audio.c
@@ -78,7 +78,7 @@ static void audio_playback_thread(void* arg)
     }
 }
 
-void audio_initialize()
+void audio_initialize(void)
 {
     Result rc=0;
 
@@ -145,7 +145,7 @@ void audio_initialize()
     if (R_SUCCEEDED(rc)) audio_thread_started = 1;
 }
 
-void audio_exit()
+void audio_exit(void)
 {
     if (audio_thread_started) {
         audio_thread_exitflag = 1;