diff --git a/src/js/DefaultRules.js b/src/js/DefaultRules.js
index db6e52410f032f8d4457d0fa477791cbc14cbd70..5a88854bce35a4ac08b86ff9733a430d651ee1c1 100644
--- a/src/js/DefaultRules.js
+++ b/src/js/DefaultRules.js
@@ -2407,6 +2407,14 @@ window.DefaultRules = (function() {
 			}
 		}
 
+		if (rule.backTat !== undefined && (rule.backTat !== "no default setting")) {
+			if ((slave.backTat !== rule.backTat)) {
+				slave.backTat = rule.backTat;
+				cashX(forceNeg(V.modCost), "slaveMod", slave);
+				r += `<br>${slave.slaveName}'s back has been tattooed.`;
+			}
+		}
+
 		if (rule.shouldersTat !== undefined && (rule.shouldersTat !== "no default setting")) {
 			if ((slave.shouldersTat !== rule.shouldersTat)) {
 				slave.shouldersTat = rule.shouldersTat;