diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index df550e2..02494db 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -16,6 +16,7 @@
 #include <errno.h>
 #include <mmc.h>
 #include <part.h>
+#include <linux/delay.h>
 #include <power/regulator.h>
 #include <malloc.h>
 #include <memalign.h>