diff --git a/data/json/overmap/overmap_terrain/overmap_terrain_river.json b/data/json/overmap/overmap_terrain/overmap_terrain_river.json
index 9e3413f534f5f..b5ff531f22c66 100644
--- a/data/json/overmap/overmap_terrain/overmap_terrain_river.json
+++ b/data/json/overmap/overmap_terrain/overmap_terrain_river.json
@@ -31,16 +31,13 @@
   },
   {
     "type": "overmap_terrain",
-    "id": [
-      "river_c_not_ne",
-      "river_c_not_nw",
-      "river_c_not_se",
-      "river_c_not_sw",
-      "river_ne",
-      "river_nw",
-      "river_se",
-      "river_sw"
-    ],
+    "id": [ "river_c_not_ne", "river_c_not_nw", "river_c_not_se", "river_c_not_sw" ],
+    "copy-from": "generic_river_bank",
+    "mapgen": [ { "method": "builtin", "name": "river_curved_not" } ]
+  },
+  {
+    "type": "overmap_terrain",
+    "id": [ "river_ne", "river_nw", "river_se", "river_sw" ],
     "copy-from": "generic_river_bank",
     "mapgen": [ { "method": "builtin", "name": "river_curved" } ]
   }