diff --git a/arch/um/drivers/vector_user.c b/arch/um/drivers/vector_user.c
index 3d8cdbdb4e66..07dc8904510b 100644
--- a/arch/um/drivers/vector_user.c
+++ b/arch/um/drivers/vector_user.c
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 #include <os.h>
 #include <um_malloc.h>
+#include <sys/uio.h>
 #include "vector_user.h"
 
 #define ID_GRE 0