diff --git a/lib/device/dev-io.c b/lib/device/dev-io.c
index cd0b1f9e4..5fac6d5ea 100644
--- a/lib/device/dev-io.c
+++ b/lib/device/dev-io.c
@@ -13,8 +13,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
-#include <sys/mount.h>
-
+#include <linux/fs.h> // UGH!!! for BLKSSZGET
 
 int dev_get_size(struct device *dev, uint64_t *size)
 {
@@ -40,6 +39,29 @@ int dev_get_size(struct device *dev, uint64_t *size)
 	return 1;
 }
 
+int dev_get_sectsize(struct device *dev, uint32_t *size)
+{
+	int fd;
+	int s;
+	const char *name = dev_name(dev);
+
+	log_very_verbose("Getting size of %s", name);
+	if ((fd = open(name, O_RDONLY)) < 0) {
+		log_sys_error("open", name);
+		return 0;
+	}
+
+	if (ioctl(fd, BLKSSZGET, &s) < 0) {
+		log_sys_error("ioctl BLKSSZGET", name);
+		close(fd);
+		return 0;
+	}
+
+	close(fd);
+	*size = (uint32_t) s;
+	return 1;
+}
+
 int dev_open(struct device *dev, int flags)
 {
 	const char *name = dev_name(dev);
@@ -167,7 +189,7 @@ int dev_zero(struct device *dev, uint64_t offset, int64_t len)
 	int fd = dev->fd;
 
 	if (fd < 0) {
-		log_error("Attempt to zero part of an unopened device %s", 
+		log_error("Attempt to zero part of an unopened device %s",
 			  name);
 		return 0;
 	}
diff --git a/lib/device/device.h b/lib/device/device.h
index 4a3338663..1042d8c46 100644
--- a/lib/device/device.h
+++ b/lib/device/device.h
@@ -26,6 +26,7 @@ struct device {
  * All io should use these routines.
  */
 int dev_get_size(struct device *dev, uint64_t *size);
+int dev_get_sectsize(struct device *dev, uint32_t *size);
 
 int dev_open(struct device *dev, int flags);
 int dev_close(struct device *dev);