diff --git a/src/kernel/connection.c b/src/kernel/connection.c
index 428ee5136..6ae173271 100644
--- a/src/kernel/connection.c
+++ b/src/kernel/connection.c
@@ -606,7 +606,7 @@ int read_borders(gamedata *data)
 {
     struct storage *store = data->store;
     for (;;) {
-        int bid = 0;
+        int fid, tid, bid;
         char zText[32];
         region *from, *to;
         border_type *type;
@@ -621,22 +621,10 @@ int read_borders(gamedata *data)
         }
 
         READ_INT(store, &bid);
-        if (data->version < UIDHASH_VERSION) {
-            int fx, fy, tx, ty;
-            READ_INT(store, &fx);
-            READ_INT(store, &fy);
-            READ_INT(store, &tx);
-            READ_INT(store, &ty);
-            from = findregion(fx, fy);
-            to = findregion(tx, ty);
-        }
-        else {
-            int fid, tid;
-            READ_INT(store, &fid);
-            READ_INT(store, &tid);
-            from = findregionbyid(fid);
-            to = findregionbyid(tid);
-        }
+        READ_INT(store, &fid);
+        READ_INT(store, &tid);
+        from = findregionbyid(fid);
+        to = findregionbyid(tid);
         if (!to || !from) {
             log_error("%s connection %d has missing regions", zText, bid);
             if (type->read) {
diff --git a/src/kernel/region.c b/src/kernel/region.c
index ee0eaa781..fa2a68464 100644
--- a/src/kernel/region.c
+++ b/src/kernel/region.c
@@ -1255,24 +1255,11 @@ int production(const region * r)
     return p;
 }
 
-void * resolve_region_coor(int id, void **address)
-{
-    int x = (id >> 16);
-    int y = id & 0xFFFF;
-    return *(region **)address = findregion(x, y);
-}
-
-#define RESOLVE_REGION_ID (TYP_REGION << 24)
-#define RESOLVE_REGION_XY ((TYP_REGION|0x10) << 24)
+#define RESOLVE_REGION (TYP_REGION << 24)
 
 void resolve_region(region *r)
 {
-    short x = (short)r->x;
-    short y = (short)r->y;
-    int id = x << 16 | (y & 0xFFFF);
-
-    resolve(RESOLVE_REGION_XY | id, r);
-    resolve(RESOLVE_REGION_ID | r->uid, r);
+    resolve(RESOLVE_REGION | r->uid, r);
 }
 
 int read_region_reference(gamedata * data, void **rp, resolve_fun fun)
@@ -1280,26 +1267,10 @@ int read_region_reference(gamedata * data, void **rp, resolve_fun fun)
     struct storage * store = data->store;
     int id = 0;
 
-    if (data->version >= UIDHASH_VERSION) {
-        READ_INT(store, &id);
-        *rp = findregionbyid(id);
-        if (*rp == NULL) {
-            ur_add(RESOLVE_REGION_ID | id, rp, fun);
-        }
-    }
-    else {
-        int n;
-        short x, y;
-        READ_INT(store, &n);
-        x = (short)n;
-        READ_INT(store, &n);
-        y = (short)n;
-        *rp = findregion(x, y);
-        if (*rp == NULL) {
-            id = x << 16 | (y & 0xFFFF);
-            ur_add(RESOLVE_REGION_XY | id, rp, resolve_region_coor);
-        }
-
+    READ_INT(store, &id);
+    *rp = findregionbyid(id);
+    if (*rp == NULL) {
+        ur_add(RESOLVE_REGION | id, rp, fun);
     }
     return id;
 }
diff --git a/src/wormhole.c b/src/wormhole.c
index 030c33c06..e12a053b8 100644
--- a/src/wormhole.c
+++ b/src/wormhole.c
@@ -96,16 +96,6 @@ static void wormhole_write(const struct attrib *a, const void *owner, struct sto
     write_region_reference(exit, store);
 }
 
-/** conversion code, turn 573, 2008-05-23 */
-static void * resolve_exit(int id, void *data)
-{
-    building *b = (building *)data;
-    if (b) {
-        return b->region;
-    }
-    return NULL;
-}
-
 static int wormhole_read(struct attrib *a, void *owner, struct gamedata *data)
 {
     int id;
@@ -113,12 +103,7 @@ static int wormhole_read(struct attrib *a, void *owner, struct gamedata *data)
     if (data->version < ATTRIBOWNER_VERSION) {
         READ_INT(data->store, NULL);
     }
-    if (data->version < UIDHASH_VERSION) {
-        id = read_building_reference(data, &a->data.v, resolve_exit);
-    }
-    else {
-        id = read_region_reference(data, &a->data.v, NULL);
-    }
+    id = read_region_reference(data, &a->data.v, NULL);
     return (id <= 0) ? AT_READ_FAIL : AT_READ_OK;
 }