diff --git a/arch/arm/mach-rk29/include/mach/memory.h b/arch/arm/mach-rk29/include/mach/memory.h
index bb8a94a848f8..3dfc5036818a 100644
--- a/arch/arm/mach-rk29/include/mach/memory.h
+++ b/arch/arm/mach-rk29/include/mach/memory.h
@@ -23,5 +23,7 @@
 #define __virt_to_bus(x)	__virt_to_phys(x)
 #define __bus_to_virt(x)	__phys_to_virt(x)
 
+#define CONSISTENT_DMA_SIZE	SZ_8M
+
 #endif