diff --git a/changelog b/changelog
index 0a80f316b72..312e71f86da 100644
--- a/changelog
+++ b/changelog
@@ -8,6 +8,9 @@ Version 1.11.8+dev:
    * Heir to the Throne:
      * Gave Li'sar a new ability "initiative" (grants adjacent allies first
        strike in melee).
+ * Editor:
+   * Added Impassable Overlay and Unwalkable Overlay terrains to the obstacle
+     group.
  * Language and i18n:
    * Updated translations: Portuguese, Scottish Gaelic
  * Lua API:
diff --git a/data/core/terrain.cfg b/data/core/terrain.cfg
index 225c1102fa4..2b143651b0e 100644
--- a/data/core/terrain.cfg
+++ b/data/core/terrain.cfg
@@ -1099,7 +1099,7 @@ Most units have about 50% defense in rocky caves, whereas cavalry are limited to
     string=^Xo
     aliasof=_bas,Xt
     mvt_alias=Xt
-    editor_group=special
+    editor_group=obstacle, special
     hide_help=yes
 [/terrain_type]
 
@@ -1111,7 +1111,7 @@ Most units have about 50% defense in rocky caves, whereas cavalry are limited to
     string=^Qov
     aliasof=_bas,Qt
     mvt_alias=Qt
-    editor_group=special
+    editor_group=obstacle, special
     hide_help=yes
 [/terrain_type]