diff --git a/board/delta/nand.c b/board/delta/nand.c
index a635a65..5024056 100644
--- a/board/delta/nand.c
+++ b/board/delta/nand.c
@@ -254,7 +254,7 @@
 			break;
 		}
 		if(get_delta(start) > timeout) {
-			DFC_DEBUG1("dfc_wait_event: TIMEOUT waiting for event: 0x%x.\n", event);
+			DFC_DEBUG1("dfc_wait_event: TIMEOUT waiting for event: 0x%lx.\n", event);
 			return 0xff000000;
 		}