diff --git a/board/netstal/hcu5/sdram.c b/board/netstal/hcu5/sdram.c
index 80e84ae..66a958c 100644
--- a/board/netstal/hcu5/sdram.c
+++ b/board/netstal/hcu5/sdram.c
@@ -71,7 +71,7 @@
 	}
 
 	get_sys_info(&board_cfg);
-	printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000);
+	printf(", %lu MHz", (board_cfg.freqPLB * 2) / 1000000);
 
 	mfsdram(DDR0_03, val);
 	val = DDR0_03_CASLAT_DECODE(val);