diff --git a/fs/ubootvarfs.c b/fs/ubootvarfs.c
index 81ec05d..475e4b7 100644
--- a/fs/ubootvarfs.c
+++ b/fs/ubootvarfs.c
@@ -409,7 +409,7 @@
 
 			list_add_tail(&var->list, &data->var_list);
 		} else {
-			pr_err("No separator in data @ 0x%08x. Skipped.",
+			pr_err("No separator in data @ 0x%08tx. Skipped.",
 			       blob - start);
 			free(var);
 		}