diff --git a/board/siemens/capricorn/board.c b/board/siemens/capricorn/board.c
index 8c61425..c46e4ff 100644
--- a/board/siemens/capricorn/board.c
+++ b/board/siemens/capricorn/board.c
@@ -27,6 +27,7 @@
 #ifndef CONFIG_SPL
 #include <asm/arch-imx8/clock.h>
 #endif
+#include <linux/delay.h>
 #include "../common/factoryset.h"
 
 #define GPIO_PAD_CTRL \
diff --git a/board/siemens/draco/board.c b/board/siemens/draco/board.c
index b4893d3..5ac73c0 100644
--- a/board/siemens/draco/board.c
+++ b/board/siemens/draco/board.c
@@ -35,6 +35,7 @@
 #include <miiphy.h>
 #include <cpsw.h>
 #include <watchdog.h>
+#include <linux/delay.h>
 #include "board.h"
 #include "../common/factoryset.h"
 #include <nand.h>
diff --git a/board/siemens/rut/board.c b/board/siemens/rut/board.c
index fff2b69..3b109e9 100644
--- a/board/siemens/rut/board.c
+++ b/board/siemens/rut/board.c
@@ -34,6 +34,7 @@
 #include <cpsw.h>
 #include <video.h>
 #include <watchdog.h>
+#include <linux/delay.h>
 #include "board.h"
 #include "../common/factoryset.h"
 #include "../../../drivers/video/da8xx-fb.h"