diff --git a/include/sys/sunldi.h b/include/sys/sunldi.h
index b4ff7391..ec842023 100644
--- a/include/sys/sunldi.h
+++ b/include/sys/sunldi.h
@@ -34,23 +34,4 @@
 
 #define SECTOR_SIZE 512
 
-typedef struct modlinkage {
-	int ml_rev;
-	struct modlfs *ml_modlfs;
-	struct modldrv *ml_modldrv;
-	major_t ml_major;
-	unsigned ml_minors;
-	void *pad1;
-} modlinkage_t;
-
-typedef struct ldi_ident {
-	char li_modname[MAXNAMELEN];
-	dev_t li_dev;
-} *ldi_ident_t;
-
-typedef struct block_device *ldi_handle_t;
-
-extern int ldi_ident_from_mod(struct modlinkage *modlp, ldi_ident_t *lip);
-extern void ldi_ident_release(ldi_ident_t li);
-
 #endif /* SPL_SUNLDI_H */