diff --git a/sys/compat/linux/linux_mmap.c b/sys/compat/linux/linux_mmap.c
index 969e49e327e..48088e8b552 100644
--- a/sys/compat/linux/linux_mmap.c
+++ b/sys/compat/linux/linux_mmap.c
@@ -282,6 +282,8 @@ linux_madvise_dontneed(struct thread *td, vm_offset_t start, vm_offset_t end)
 		object = entry->object.vm_object;
 		if (object == NULL)
 			continue;
+		if ((object->flags & (OBJ_UNMANAGED | OBJ_FICTITIOUS)) != 0)
+			continue;
 
 		pstart = OFF_TO_IDX(entry->offset);
 		if (start > entry->start) {