diff --git a/arch/arm/mach-rk29/include/mach/rk29_iomap.h b/arch/arm/mach-rk29/include/mach/rk29_iomap.h
index 200113c5e195..d2166053d2cf 100755
--- a/arch/arm/mach-rk29/include/mach/rk29_iomap.h
+++ b/arch/arm/mach-rk29/include/mach/rk29_iomap.h
@@ -29,7 +29,7 @@
 #define RK29_ADDR_BASE1 			0xF5000000  
 #define RK29_ADDR_BASE0 			0xF4000000
 
-#define RK29_SDRAM_PHYS				0x60000000
+#define RK29_SDRAM_PHYS				0x60000000U
 #define RK29_AXI1_PHYS				0x10000000	
 #define RK29_AXI0_PHYS				0x1012C000			
 #define RK29_PERI_PHYS				0x10140000