diff --git a/package/system/urngd/patches/001-fix-compile.patch b/package/system/urngd/patches/001-fix-compile.patch
new file mode 100644
index 0000000000..c9ab6857bb
--- /dev/null
+++ b/package/system/urngd/patches/001-fix-compile.patch
@@ -0,0 +1,11 @@
+--- a/urngd.c
++++ b/urngd.c
+@@ -114,7 +114,7 @@ static size_t gather_entropy(struct urng
+ 
+ 	ret = write_entropy(u, buf, sizeof(buf), ENTROPYBYTES);
+ 	if (sizeof(buf) != ret) {
+-		ERROR("injected %lub of entropy, less then %db expected\n",
++		ERROR("injected %zub of entropy, less then %db expected\n",
+ 		      ret, sizeof(buf));
+ 	} else {
+ 		ret = sizeof(buf);