diff --git a/criu/files.c b/criu/files.c
index 5d6b1139d..3a57682c8 100644
--- a/criu/files.c
+++ b/criu/files.c
@@ -708,7 +708,7 @@ static struct fdinfo_list_entry *alloc_fle(int pid, FdinfoEntry *fe)
 	return fle;
 }
 
-static int collect_fd(int pid, FdinfoEntry *e, struct rst_info *rst_info)
+int collect_fd(int pid, FdinfoEntry *e, struct rst_info *rst_info)
 {
 	struct fdinfo_list_entry *le, *new_le;
 	struct file_desc *fdesc;
diff --git a/criu/include/files.h b/criu/include/files.h
index 275b36e2d..0d711b75c 100644
--- a/criu/include/files.h
+++ b/criu/include/files.h
@@ -116,6 +116,7 @@ struct file_desc_ops {
 	char *			(*name)(struct file_desc *, char *b, size_t s);
 };
 
+int collect_fd(int pid, FdinfoEntry *e, struct rst_info *rst_info);
 void collect_task_fd(struct fdinfo_list_entry *new_fle, struct rst_info *ri);
 
 unsigned int find_unused_fd(struct pstree_item *, int hint_fd);