diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 90d1e27ee7..b3698e34ad 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -36,6 +36,7 @@
 #include "hw/sd/sd.h"
 #include "qapi/error.h"
 #include "qemu/bitmap.h"
+#include "qemu/cutils.h"
 #include "hw/qdev-properties.h"
 #include "qemu/error-report.h"
 #include "qemu/timer.h"
@@ -343,7 +344,7 @@ static void sd_set_csd(SDState *sd, uint64_t size)
     uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
     uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
 
-    if (size <= 0x40000000) {	/* Standard Capacity SD */
+    if (size <= 1 * G_BYTE) { /* Standard Capacity SD */
         sd->csd[0] = 0x00;	/* CSD structure */
         sd->csd[1] = 0x26;	/* Data read access-time-1 */
         sd->csd[2] = 0x00;	/* Data read access-time-2 */