diff --git a/board/synopsys/axs10x/axs10x.c b/board/synopsys/axs10x/axs10x.c
index fa982bd..4bd88f8 100644
--- a/board/synopsys/axs10x/axs10x.c
+++ b/board/synopsys/axs10x/axs10x.c
@@ -9,6 +9,7 @@
 #include <malloc.h>
 #include <asm/arcregs.h>
 #include "axs10x.h"
+#include <asm/cache.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
index 8ccd84c..e32e782 100644
--- a/board/synopsys/hsdk/hsdk.c
+++ b/board/synopsys/hsdk/hsdk.c
@@ -10,6 +10,7 @@
 #include <env.h>
 #include <init.h>
 #include <irq_func.h>
+#include <asm/cache.h>
 #include <linux/printk.h>
 #include <linux/kernel.h>
 #include <linux/io.h>