diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index f3a3f8a..0ffd7ac 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -18,6 +18,7 @@
 #include "kern_util.h"
 #include "net_user.h"
 #include "os.h"
+#include "um_malloc.h"
 
 int tap_open_common(void *dev, char *gate_addr)
 {