Add missing include

diff --git a/src/core/nvo.c b/src/core/nvo.c
index 24fb1e65f81205b9e2b1ca446dab18c3e5f8c012..14ed4e194b130d62d29aacab761cbc2a3009ad7b 100644 (file)
--- a/src/core/nvo.c
+++ b/src/core/nvo.c
@@ -18,6 +18,7 @@
 
 #include <stdint.h>
 #include <string.h>
+#include <errno.h>
 #include <gpxe/dhcp.h>
 #include <gpxe/nvs.h>
 #include <gpxe/nvo.h>