1 files changed, 4 insertions, 2 deletions
diff --git a/src/basic/arphrd-list.c b/src/basic/arphrd-list.c
index a7ae4b8162..b6e2486b67 100644
--- a/src/basic/arphrd-list.c
+++ b/src/basic/arphrd-list.c
@@ -1,10 +1,12 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 
+#include <errno.h>
 #include <net/if_arp.h>
 #include <string.h>
 
 #include "arphrd-list.h"
 #include "macro.h"
+#include "missing_network.h"
 
 static const struct arphrd_name* lookup_arphrd(register const char *str, register GPERF_LEN_TYPE len);
 
@@ -16,7 +18,7 @@ const char *arphrd_to_name(int id) {
         if (id <= 0)
                 return NULL;
 
-        if (id >= (int) ELEMENTSOF(arphrd_names))
+        if ((size_t) id >= ELEMENTSOF(arphrd_names))
                 return NULL;
 
         return arphrd_names[id];
@@ -29,7 +31,7 @@ int arphrd_from_name(const char *name) {
 
         sc = lookup_arphrd(name, strlen(name));
         if (!sc)
-                return 0;
+                return -EINVAL;
 
         return sc->id;
 }