diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h
index 514ed45c462eaf0516cbdd9f07d3f96bfada4cc7..d117b29d106227b1036520f870b25b9df316c4f3 100644
--- a/include/linux/amba/serial.h
+++ b/include/linux/amba/serial.h
@@ -23,6 +23,8 @@
 #ifndef ASM_ARM_HARDWARE_SERIAL_AMBA_H
 #define ASM_ARM_HARDWARE_SERIAL_AMBA_H
 
+#include <linux/types.h>
+
 /* -------------------------------------------------------------------------------
  *  From AMBA UART (PL010) Block Specification
  * -------------------------------------------------------------------------------