diff --git a/libdm/.export.sym b/libdm/.export.sym
index ed14d5a12..07ce90884 100644
--- a/libdm/.export.sym
+++ b/libdm/.export.sym
@@ -13,6 +13,7 @@ Base {
 		dm_task_get_uuid;
 		dm_task_set_ro;
 		dm_task_set_newname;
+		dm_task_set_event_nr;
 		dm_task_set_major;
 		dm_task_set_minor;
 		dm_task_add_target;
diff --git a/libdm/ioctl/libdevmapper.c b/libdm/ioctl/libdevmapper.c
index 7d3ebc8cf..367c21433 100644
--- a/libdm/ioctl/libdevmapper.c
+++ b/libdm/ioctl/libdevmapper.c
@@ -128,6 +128,7 @@ static int _dm_task_get_info_v1(struct dm_task *dmt, struct dm_info *info)
 	info->read_only = dmt->dmi.v1->flags & DM_READONLY_FLAG ? 1 : 0;
 	info->target_count = dmt->dmi.v1->target_count;
 	info->open_count = dmt->dmi.v1->open_count;
+	info->event_nr = 0;
 	info->major = MAJOR(dmt->dmi.v1->dev);
 	info->minor = MINOR(dmt->dmi.v1->dev);
 
@@ -513,6 +514,7 @@ int dm_task_get_info(struct dm_task *dmt, struct dm_info *info)
 	info->read_only = dmt->dmi.v3->flags & DM_READONLY_FLAG ? 1 : 0;
 	info->target_count = dmt->dmi.v3->target_count;
 	info->open_count = dmt->dmi.v3->open_count;
+	info->event_nr = dmt->dmi.v3->event_nr;
 	info->major = MAJOR(dmt->dmi.v3->dev);
 	info->minor = MINOR(dmt->dmi.v3->dev);
 
@@ -552,6 +554,13 @@ int dm_task_set_newname(struct dm_task *dmt, const char *newname)
 	return 1;
 }
 
+int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr)
+{
+	dmt->event_nr = event_nr;
+
+	return 1;
+}
+
 struct target *create_target(uint64_t start, uint64_t len, const char *type,
 			     const char *params)
 {
@@ -691,6 +700,7 @@ static struct dm_ioctl *_flatten(struct dm_task *dmt)
 		strncpy(dmi->uuid, dmt->uuid, sizeof(dmi->uuid));
 
 	dmi->target_count = count;
+	dmi->event_nr = dmt->event_nr;
 
 	b = (void *) (dmi + 1);
 	e = (void *) ((char *) dmi + len);
diff --git a/libdm/ioctl/libdm-targets.h b/libdm/ioctl/libdm-targets.h
index 96f25c402..8c42aa408 100644
--- a/libdm/ioctl/libdm-targets.h
+++ b/libdm/ioctl/libdm-targets.h
@@ -28,6 +28,7 @@ struct dm_task {
 	struct target *head, *tail;
 
 	int read_only;
+	uint32_t event_nr;
 	int major;
 	int minor;
 	union {
diff --git a/libdm/libdevmapper.h b/libdm/libdevmapper.h
index 1a865c456..a9148d490 100644
--- a/libdm/libdevmapper.h
+++ b/libdm/libdevmapper.h
@@ -66,6 +66,7 @@ struct dm_info {
 	int exists;
 	int suspended;
 	int32_t open_count;
+	uint32_t event_nr;
 	uint32_t major;
 	uint32_t minor;		/* minor device number */
 	int read_only;		/* 0:read-write; 1:read-only */
@@ -90,6 +91,7 @@ int dm_task_set_ro(struct dm_task *dmt);
 int dm_task_set_newname(struct dm_task *dmt, const char *newname);
 int dm_task_set_minor(struct dm_task *dmt, int minor);
 int dm_task_set_major(struct dm_task *dmt, int major);
+int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr);
 
 /*
  * Use these to prepare for a create or reload.