diff --git a/lib/device/dev-mpath.c b/lib/device/dev-mpath.c
index 27b0f41a6..2040edac3 100644
--- a/lib/device/dev-mpath.c
+++ b/lib/device/dev-mpath.c
@@ -815,7 +815,7 @@ const char *dev_mpath_component_wwid(struct cmd_context *cmd, struct device *dev
 
 	/* /sys/dev/block/253:7/slaves/sda/device/wwid */
 
-	if (dm_snprintf(slaves_path, sizeof(slaves_path), "%s/dev/block/%d:%d/slaves",
+	if (dm_snprintf(slaves_path, sizeof(slaves_path), "%sdev/block/%d:%d/slaves",
 			dm_sysfs_dir(), (int)MAJOR(dev->dev), (int)MINOR(dev->dev)) < 0) {
 		log_warn("Sysfs path to check mpath components is too long.");
 		return NULL;
@@ -845,7 +845,7 @@ const char *dev_mpath_component_wwid(struct cmd_context *cmd, struct device *dev
 
 		/* read /sys/block/sda/device/wwid */
 
-		if (dm_snprintf(wwid_path, sizeof(wwid_path), "%s/block/%s/device/wwid",
+		if (dm_snprintf(wwid_path, sizeof(wwid_path), "%sblock/%s/device/wwid",
        				dm_sysfs_dir(), slave_name) < 0) {
 			log_warn("Failed to create sysfs wwid path for %s", slave_name);
 			continue;
diff --git a/lib/device/dev-type.c b/lib/device/dev-type.c
index 939eb4aeb..1dc895b54 100644
--- a/lib/device/dev-type.c
+++ b/lib/device/dev-type.c
@@ -548,7 +548,7 @@ static int _has_sys_partition(struct device *dev)
 	int minor = (int) MINOR(dev->dev);
 
 	/* check if dev is a partition */
-	if (dm_snprintf(path, sizeof(path), "%s/dev/block/%d:%d/partition",
+	if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d/partition",
 			dm_sysfs_dir(), major, minor) < 0) {
 		log_warn("WARNING: %s: partition path is too long.", dev_name(dev));
 		return 0;
@@ -775,7 +775,7 @@ int dev_get_primary_dev(struct dev_types *dt, struct device *dev, dev_t *result)
 	 * - basename ../../block/md0/md0  = md0
 	 * Parent's 'dev' sysfs attribute  = /sys/block/md0/dev
 	 */
-	if (dm_snprintf(path, sizeof(path), "%s/dev/block/%d:%d",
+	if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d",
 			dm_sysfs_dir(), major, minor) < 0) {
 		log_warn("WARNING: %s: major:minor sysfs path is too long.", dev_name(dev));
 		return 0;
@@ -787,7 +787,7 @@ int dev_get_primary_dev(struct dev_types *dt, struct device *dev, dev_t *result)
 
 	temp_path[size] = '\0';
 
-	if (dm_snprintf(path, sizeof(path), "%s/block/%s/dev",
+	if (dm_snprintf(path, sizeof(path), "%sblock/%s/dev",
 			dm_sysfs_dir(), basename(dirname(temp_path))) < 0) {
 		log_warn("WARNING: sysfs path for %s is too long.",
 			 basename(dirname(temp_path)));
@@ -1095,7 +1095,7 @@ int wipe_known_signatures(struct cmd_context *cmd, struct device *dev,
 static int _snprintf_attr(char *buf, size_t buf_size, const char *sysfs_dir,
 			 const char *attribute, dev_t dev)
 {
-	if (dm_snprintf(buf, buf_size, "%s/dev/block/%d:%d/%s", sysfs_dir,
+	if (dm_snprintf(buf, buf_size, "%sdev/block/%d:%d/%s", sysfs_dir,
 			(int)MAJOR(dev), (int)MINOR(dev),
 			attribute) < 0) {
 		log_warn("WARNING: sysfs path for %s attribute is too long.", attribute);
diff --git a/lib/metadata/vdo_manip.c b/lib/metadata/vdo_manip.c
index 0db401537..779883d03 100644
--- a/lib/metadata/vdo_manip.c
+++ b/lib/metadata/vdo_manip.c
@@ -148,7 +148,7 @@ static int _sysfs_get_kvdo_value(const char *dm_name, const struct dm_info *dmin
 	char temp[64];
 	int fd, size, r = 0;
 
-	if (dm_snprintf(path, sizeof(path), "%s/block/dm-%d/vdo/%s",
+	if (dm_snprintf(path, sizeof(path), "%sblock/dm-%d/vdo/%s",
 			dm_sysfs_dir(), dminfo->minor, vdo_param) < 0) {
 		log_debug("Failed to build kvdo path.");
 		return 0;