diff --git a/sound/soc/s3c24xx/s3c64xx-i2s.h b/sound/soc/s3c24xx/s3c64xx-i2s.h
index 19bd444bf8a6f01f7de72348cb4dfc59424270d5..de4075d26f0cb48c48bc1e37161bc689c0de5607 100644
--- a/sound/soc/s3c24xx/s3c64xx-i2s.h
+++ b/sound/soc/s3c24xx/s3c64xx-i2s.h
@@ -36,5 +36,6 @@ struct clk;
 	(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
 	 SNDRV_PCM_FMTBIT_S24_LE)
 
+struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai);
 
 #endif /* __SND_SOC_S3C24XX_S3C64XX_I2S_H */