diff --git a/cr-dump.c b/cr-dump.c
index b695095de..71a3ded35 100644
--- a/cr-dump.c
+++ b/cr-dump.c
@@ -130,7 +130,7 @@ static int dump_one_reg_file(const struct fd_parms *p, int lfd,
 	if (likely(!fd_is_special(&e))) {
 		u64 id;
 
-		id = fd_id_entry_collect((u32)p->id, p->pid, p->fd_name);
+		id = fd_id_entry_collect(p->id, p->pid, p->fd_name);
 		if (id < 0)
 			goto err;
 
diff --git a/file-ids.c b/file-ids.c
index 74ae3ffa6..6131ab799 100644
--- a/file-ids.c
+++ b/file-ids.c
@@ -191,7 +191,7 @@ err:
 	return sub;
 }
 
-static struct fd_id_entry *lookup_alloc_node(u64 genid, pid_t pid, int fd)
+static struct fd_id_entry *lookup_alloc_node(u32 genid, pid_t pid, int fd)
 {
 	struct rb_node *node = fd_id_root.rb_node;
 	struct fd_id_entry *e = NULL;
@@ -221,7 +221,7 @@ err:
 
 }
 
-long fd_id_entry_collect(u64 genid, pid_t pid, int fd)
+long fd_id_entry_collect(u32 genid, pid_t pid, int fd)
 {
 	struct fd_id_entry *e = NULL;
 
diff --git a/include/file-ids.h b/include/file-ids.h
index fd565ac11..d4ce35201 100644
--- a/include/file-ids.h
+++ b/include/file-ids.h
@@ -11,7 +11,7 @@
 #define MAKE_FD_GENID(dev, ino, pos) \
 	(((u32)(dev) ^ (u32)(ino) ^ (u32)(pos)))
 
-extern long fd_id_entry_collect(u64 genid, pid_t pid, int fd);
+extern long fd_id_entry_collect(u32 genid, pid_t pid, int fd);
 extern void fd_id_show_tree(void);
 
 #endif /* FILE_IDS_H__ */