diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c
index b7adba666c55..acfd2580e6bf 100644
--- a/sys/vm/vm_fault.c
+++ b/sys/vm/vm_fault.c
@@ -66,7 +66,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_fault.c,v 1.59 1996/12/14 17:54:13 dyson Exp $
+ * $Id: vm_fault.c,v 1.60 1996/12/29 02:33:12 dyson Exp $
  */
 
 /*
@@ -701,6 +701,7 @@ readrest:
 			object = first_object;
 			pindex = first_pindex;
 
+#if defined(OLD_COLLAPSE_CODE)
 			/*
 			 * Now that we've gotten the copy out of the way,
 			 * let's try to collapse the top object.
@@ -711,6 +712,7 @@ readrest:
 			vm_object_pip_wakeup(object);
 			vm_object_collapse(object);
 			object->paging_in_progress++;
+#endif
 		} else {
 			prot &= ~VM_PROT_WRITE;
 		}
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
index 02fa49f56c2c..d97044feb695 100644
--- a/sys/vm/vm_map.c
+++ b/sys/vm/vm_map.c
@@ -2084,10 +2084,12 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry)
 		 * Make a copy of the object.
 		 */
 		if (src_entry->object.vm_object) {
+#if defined(OLD_COLLAPSE_CODE)
 			if ((src_entry->object.vm_object->handle == NULL) &&
 				(src_entry->object.vm_object->type == OBJT_DEFAULT ||
 				 src_entry->object.vm_object->type == OBJT_SWAP))
 				vm_object_collapse(src_entry->object.vm_object);
+#endif
 			++src_entry->object.vm_object->ref_count;
 			src_entry->copy_on_write = TRUE;
 			src_entry->needs_copy = TRUE;
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c
index bb51ee2cf5ba..baa376101e52 100644
--- a/sys/vm/vm_object.c
+++ b/sys/vm/vm_object.c
@@ -793,6 +793,7 @@ vm_object_shadow(object, offset, length)
 }
 
 
+#if defined(OLD_COLLAPSE_CODE)
 /*
  * this version of collapse allows the operation to occur earlier and
  * when paging_in_progress is true for an object...  This is not a complete
@@ -860,6 +861,7 @@ vm_object_qcollapse(object)
 	}
 	backing_object->ref_count -= 2;
 }
+#endif
 
 /*
  *	vm_object_collapse:
@@ -912,7 +914,9 @@ vm_object_collapse(object)
 
 		if (object->paging_in_progress != 0 ||
 		    backing_object->paging_in_progress != 0) {
+#if defined(OLD_COLLAPSE_CODE)
 			vm_object_qcollapse(object);
+#endif
 			return;
 		}
 
@@ -1288,10 +1292,12 @@ vm_object_coalesce(prev_object, prev_pindex, prev_size, next_size)
 		return (FALSE);
 	}
 
+#if defined(OLD_COLLAPSE_CODE)
 	/*
 	 * Try to collapse the object first
 	 */
 	vm_object_collapse(prev_object);
+#endif
 
 	/*
 	 * Can't coalesce if: . more than one reference . paged out . shadows
diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
index 8b20f09c669a..808cc279b755 100644
--- a/sys/vm/vm_pageout.c
+++ b/sys/vm/vm_pageout.c
@@ -65,7 +65,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_pageout.c,v 1.86 1996/09/28 03:33:40 dyson Exp $
+ * $Id: vm_pageout.c,v 1.87 1996/11/28 23:15:06 dyson Exp $
  */
 
 /*
@@ -215,12 +215,15 @@ vm_pageout_clean(m, sync)
 	    ((m->busy != 0) || (m->flags & PG_BUSY)))
 		return 0;
 
+#if defined(OLD_COLLAPSE_CODE)
 	/*
 	 * Try collapsing before it's too late.
 	 */
 	if (!sync && object->backing_object) {
 		vm_object_collapse(object);
 	}
+#endif
+
 	mc[vm_pageout_page_count] = m;
 	pageout_count = 1;
 	page_base = vm_pageout_page_count;