diff --git a/src/audio/sun/SDL_sunaudio.c b/src/audio/sun/SDL_sunaudio.c
index 488d4c2f6..c9857ffe6 100644
--- a/src/audio/sun/SDL_sunaudio.c
+++ b/src/audio/sun/SDL_sunaudio.c
@@ -165,9 +165,9 @@ void DSP_WaitAudio(_THIS)
 #endif
 }
 
+static Uint8 snd2au(int sample);
 void DSP_PlayAudio(_THIS)
 {
-	static Uint8 snd2au(int sample);
 	/* Write the audio data */
 	if ( ulaw_only ) {
 		/* Assuming that this->spec.freq >= 8000 Hz */