diff --git a/data/schema/units/modifications.cfg b/data/schema/units/modifications.cfg
index ca8805e04bd3..645cf10ca750 100644
--- a/data/schema/units/modifications.cfg
+++ b/data/schema/units/modifications.cfg
@@ -204,6 +204,12 @@
 				value=image_mod,overlay
 				{SIMPLE_KEY replace string}
 				{SIMPLE_KEY add string}
+				[link]
+					name="game_config/color_range"
+				[/link]
+				[link]
+					name="game_config/color_palette"
+				[/link]
 			[/case]
 			[case]
 				value=ellipse