diff --git a/data/core/terrain-graphics/corner_overlay.cfg b/data/core/terrain-graphics/corner_overlay.cfg
index 2711ebfc4d6..1606ef39899 100644
--- a/data/core/terrain-graphics/corner_overlay.cfg
+++ b/data/core/terrain-graphics/corner_overlay.cfg
@@ -37,9 +37,9 @@
     [/terrain_graphics]
 #enddef
 
-##define CORNER_OVERLAY_PLF TERRAIN  ADJACENT1 ADJACENT2 PROB LAYER FLAG IMAGE
+#!define CORNER_OVERLAY_PLF TERRAIN  ADJACENT1 ADJACENT2 PROB LAYER FLAG IMAGE
 #    {CORNER_OVERLAY_PLBF ({TERRAIN}) ({ADJACENT1}) ({ADJACENT2}) ({PROB}) ({LAYER}) (54,72) {FLAG} {IMAGE} }
-##enddef
+#!enddef
 
 #meta-macro CORNER_OVERLAY TERRAIN ADJACENT1 ADJACENT2 P=PROB=100 L=LAYER=0 B=BASE=(54,72) F=FLAG=overlay IMAGE
 
diff --git a/data/core/terrain-graphics/transitions_overlay.cfg b/data/core/terrain-graphics/transitions_overlay.cfg
index a6696e4f496..dba7eef31ea 100644
--- a/data/core/terrain-graphics/transitions_overlay.cfg
+++ b/data/core/terrain-graphics/transitions_overlay.cfg
@@ -37,9 +37,9 @@
     [/terrain_graphics]
 #enddef
 
-##define TRANSITION1_OVERLAY_PLF TERRAIN  ADJACENT PROB LAYER FLAG IMAGE
+#!define TRANSITION1_OVERLAY_PLF TERRAIN  ADJACENT PROB LAYER FLAG IMAGE
 #    {TRANSITION1_OVERLAY_PLBF ({TERRAIN}) ({ADJACENT}) ({PROB}) ({LAYER}) (90,144) {FLAG} {IMAGE} }
-##enddef
+#!enddef
 
 #meta-macro TRANSITION1_OVERLAY TERRAIN  ADJACENT P=PROB=100 L=LAYER=0 B=BASE=(90,144) F=FLAG=overlay IMAGE
 
@@ -74,9 +74,9 @@
     [/terrain_graphics]
 #enddef
 
-##define TRANSITION2_OVERLAY_PLF TERRAIN  ADJACENT PROB LAYER FLAG IMAGE
+#!define TRANSITION2_OVERLAY_PLF TERRAIN  ADJACENT PROB LAYER FLAG IMAGE
 #    {TRANSITION2_OVERLAY_PLBF ({TERRAIN}) ({ADJACENT}) ({PROB}) ({LAYER}) (90,144) {FLAG} {IMAGE} }
-##enddef
+#!enddef
 
 #meta-macro TRANSITION2_OVERLAY TERRAIN  ADJACENT P=PROB=100 L=LAYER=0 B=BASE=(90,144) F=FLAG=overlay IMAGE