diff --git a/sys/vm/vm_object.h b/sys/vm/vm_object.h
index e26465c48fe9..e957c4cce396 100644
--- a/sys/vm/vm_object.h
+++ b/sys/vm/vm_object.h
@@ -183,8 +183,8 @@ struct vm_object {
 #define	OBJ_DISCONNECTWNT 0x4000	/* disconnect from vnode wanted */
 #define	OBJ_TMPFS	0x8000		/* has tmpfs vnode allocated */
 
-#define IDX_TO_OFF(idx) (((vm_ooffset_t)(idx)) << PAGE_SHIFT)
-#define OFF_TO_IDX(off) ((vm_pindex_t)(((vm_ooffset_t)(off)) >> PAGE_SHIFT))
+#define	IDX_TO_OFF(idx) (((vm_ooffset_t)(idx)) << PAGE_SHIFT)
+#define	OFF_TO_IDX(off) ((vm_pindex_t)(((vm_ooffset_t)(off)) >> PAGE_SHIFT))
 
 #ifdef	_KERNEL