diff --git a/data/core/terrain-graphics/new-macros.cfg b/data/core/terrain-graphics/new-macros.cfg
index 952f6c52f74..8de67b2ca1e 100644
--- a/data/core/terrain-graphics/new-macros.cfg
+++ b/data/core/terrain-graphics/new-macros.cfg
@@ -1071,7 +1071,7 @@
 #enddef
 
 #define NEW:WALL2_P TERRAINLIST ADJACENT1 ADJACENT2 PROB IMAGESTEM
-    {NEW:WALL {TERRAINLIST} {ADJACENT1} {IMAGESTEM}}
+    {NEW:WALL_P {TERRAINLIST} {ADJACENT1} {PROB} {IMAGESTEM}}
 
     [terrain_graphics]
         map="
@@ -1095,6 +1095,7 @@
         [/tile]
 
         rotations=tr,r,br,bl,l,tl
+        probability={PROB}
 
         [image]
             layer=0
@@ -1126,6 +1127,7 @@
         [/tile]
 
         rotations=tr,r,br,bl,l,tl
+        probability={PROB}
 
         [image]
             layer=0