diff --git a/drivers/tpm/tpm-uclass.c b/drivers/tpm/tpm-uclass.c
index 19c0502..6ea795b 100644
--- a/drivers/tpm/tpm-uclass.c
+++ b/drivers/tpm/tpm-uclass.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <dm.h>
 #include <log.h>
+#include <linux/delay.h>
 #include <linux/unaligned/be_byteshift.h>
 #include <tpm-v1.h>
 #include <tpm-v2.h>