diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index 415f75ea..a913c335 100644
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -53,12 +53,13 @@ const char *_snd_module_pcm_dmix = "";
  *
  */
 
+static int shm_sum_discard(snd_pcm_direct_t *dmix);
+
 /*
  *  sum ring buffer shared memory area 
  */
 static int shm_sum_create_or_connect(snd_pcm_direct_t *dmix)
 {
-	static int shm_sum_discard(snd_pcm_direct_t *dmix);
 	struct shmid_ds buf;
 	int tmpid, err;
 	size_t size;