diff --git a/sys/dev/mmc/mmcsd.c b/sys/dev/mmc/mmcsd.c
index 3c626a99def..70ffb77e796 100644
--- a/sys/dev/mmc/mmcsd.c
+++ b/sys/dev/mmc/mmcsd.c
@@ -327,7 +327,7 @@ mmcsd_attach(device_t dev)
 			    (ext_csd[EXT_CSD_ENH_START_ADDR + 1] << 8) +
 			    (ext_csd[EXT_CSD_ENH_START_ADDR + 2] << 16) +
 			    (ext_csd[EXT_CSD_ENH_START_ADDR + 3] << 24)) *
-			    (sc->high_cap != 0 ? MMC_SECTOR_SIZE : 1);
+			    (sc->high_cap == 0 ? MMC_SECTOR_SIZE : 1);
 		} else if (bootverbose)
 			device_printf(dev,
 			    "enhanced user data area spans entire device\n");