diff --git a/board/freescale/imx8mm_evk/spl.c b/board/freescale/imx8mm_evk/spl.c
index 2d08f9a..e28f795 100644
--- a/board/freescale/imx8mm_evk/spl.c
+++ b/board/freescale/imx8mm_evk/spl.c
@@ -37,7 +37,7 @@
 	}
 }
 
-void spl_dram_init(void)
+static void spl_dram_init(void)
 {
 	ddr_init(&dram_timing);
 }
@@ -82,7 +82,7 @@
 	return 0;
 }
 
-int power_init_board(void)
+static int power_init_board(void)
 {
 	struct udevice *dev;
 	int ret;