diff --git a/drivers/i2c/designware_i2c.h b/drivers/i2c/designware_i2c.h
index 7ee2361..dc9a6cc 100644
--- a/drivers/i2c/designware_i2c.h
+++ b/drivers/i2c/designware_i2c.h
@@ -10,6 +10,7 @@
 #include <clk.h>
 #include <i2c.h>
 #include <reset.h>
+#include <linux/bitops.h>
 
 struct i2c_regs {
 	u32 ic_con;		/* 0x00 */