diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index d7684d3..b2788d5 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -54,7 +54,7 @@
 
 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 {
-	return (void *)(gd->ram_buf + paddr);
+	return (void *)(gd->arch.ram_buf + paddr);
 }
 
 void flush_dcache_range(unsigned long start, unsigned long stop)
diff --git a/arch/sandbox/include/asm/global_data.h b/arch/sandbox/include/asm/global_data.h
index f33f465..3ba7ed5 100644
--- a/arch/sandbox/include/asm/global_data.h
+++ b/arch/sandbox/include/asm/global_data.h
@@ -28,6 +28,7 @@
 
 /* Architecture-specific global data */
 struct arch_global_data {
+	u8		*ram_buf;	/* emulated RAM buffer */
 };
 
 /*
@@ -46,7 +47,6 @@
 	unsigned long	env_addr;	/* Address  of Environment struct */
 	unsigned long	env_valid;	/* Checksum of Environment valid? */
 	unsigned long	fb_base;	/* base address of frame buffer */
-	u8		*ram_buf;	/* emulated RAM buffer */
 	phys_size_t	ram_size;	/* RAM size */
 	const void	*fdt_blob;	/* Our device tree, NULL if none */
 	void		**jt;		/* jump table */
diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c
index 83858c1..3752fab 100644
--- a/arch/sandbox/lib/board.c
+++ b/arch/sandbox/lib/board.c
@@ -174,7 +174,7 @@
 	mem = os_malloc(CONFIG_SYS_SDRAM_SIZE);
 
 	assert(mem);
-	gd->ram_buf = mem;
+	gd->arch.ram_buf = mem;
 	addr = (ulong)(mem + size);
 
 	/*
@@ -227,8 +227,8 @@
 #endif
 
 	/* The Malloc area is at the top of simulated DRAM */
-	mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN,
-			TOTAL_MALLOC_LEN);
+	mem_malloc_init((ulong)gd->arch.ram_buf + gd->ram_size -
+			TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
 
 	/* initialize environment */
 	env_relocate();