diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c
index 79f2510..72c2f36 100644
--- a/drivers/dma/apbh_dma.c
+++ b/drivers/dma/apbh_dma.c
@@ -67,7 +67,7 @@
 /*
  * Test is the DMA channel is valid channel
  */
-int mxs_dma_validate_chan(int channel)
+static int mxs_dma_validate_chan(int channel)
 {
 	struct mxs_dma_chan *pchan;