diff --git a/drivers/console/multi_console.c b/drivers/console/multi_console.c
index 08b8e9f..a68a018 100644
--- a/drivers/console/multi_console.c
+++ b/drivers/console/multi_console.c
@@ -5,6 +5,7 @@
  */
 
 #include <assert.h>
+#include <stddef.h>
 
 #include <drivers/console.h>