diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index 1b1b411..400a04d 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -28,6 +28,7 @@
 #include <linux/string.h>
 #include <linux/kernel.h>
 #include <linux/keyctl.h>
+#include <linux/err.h>
 #include <keys/dns_resolver-type.h>
 #include <keys/user-type.h>
 #include "internal.h"
diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c
index 6c0cf31..b33e1f7 100644
--- a/net/dns_resolver/dns_query.c
+++ b/net/dns_resolver/dns_query.c
@@ -39,6 +39,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/dns_resolver.h>
+#include <linux/err.h>
 #include <keys/dns_resolver-type.h>
 #include <keys/user-type.h>