diff --git a/drivers/fpga/socfpga_arria10.c b/drivers/fpga/socfpga_arria10.c
index 272f6d5..e142046 100644
--- a/drivers/fpga/socfpga_arria10.c
+++ b/drivers/fpga/socfpga_arria10.c
@@ -18,6 +18,7 @@
 #include <fs_loader.h>
 #include <wait_bit.h>
 #include <watchdog.h>
+#include <linux/delay.h>
 
 #define CFGWDTH_32	1
 #define MIN_BITSTREAM_SIZECHECK	230