diff --git a/sys/alpha/alpha/pmap.c b/sys/alpha/alpha/pmap.c
index 0888bb05d243..2ec573c1ea9c 100644
--- a/sys/alpha/alpha/pmap.c
+++ b/sys/alpha/alpha/pmap.c
@@ -1830,7 +1830,7 @@ pmap_collect()
 	for(i = 0; i < vm_page_array_size; i++) {
 		m = &vm_page_array[i];
 		if (m->wire_count || m->hold_count || m->busy ||
-		    (m->flags & PG_BUSY))
+		    (m->flags & (PG_BUSY | PG_UNMANAGED)))
 			continue;
 		pmap_remove_all(m);
 	}
diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c
index 64a3ca4abfa2..3385c4d85644 100644
--- a/sys/ia64/ia64/pmap.c
+++ b/sys/ia64/ia64/pmap.c
@@ -1455,7 +1455,7 @@ pmap_collect()
 	for(i = 0; i < vm_page_array_size; i++) {
 		m = &vm_page_array[i];
 		if (m->wire_count || m->hold_count || m->busy ||
-		    (m->flags & PG_BUSY))
+		    (m->flags & (PG_BUSY | PG_UNMANAGED)))
 			continue;
 		pmap_remove_all(m);
 	}