diff --git a/src/gui/Encyclopedia/encyclopediaObtainingSlaves.js b/src/gui/Encyclopedia/encyclopediaObtainingSlaves.js
index 33e06c1ca5580965cc3ccd997002bc78b57f99ad..12a2e578aa316a6904e2e56dad5c03b39a467e7c 100644
--- a/src/gui/Encyclopedia/encyclopediaObtainingSlaves.js
+++ b/src/gui/Encyclopedia/encyclopediaObtainingSlaves.js
@@ -38,7 +38,7 @@ App.Encyclopedia.addArticle("Slave Schools", function() {
 	r.push(App.Encyclopedia.link("body modification", "Slave Modification"));
 	r.push("free,");
 	if (!V.minimumSlaveAge || V.minimumSlaveAge < 19) {
-		r.push(`${V.minimumSlaveAge ? V.minimumSlaveAge : up} to 19 years of age,`);
+		r.push(`${V.minimumSlaveAge ? V.minimumSlaveAge : "up"} to 19 years of age,`);
 	}
 	r.push("very obedient, and 100% virgin.");
 	r.push("A few schools specialize in slaves with non-standard organs or in modified slaves, but most protect brand identity by confining themselves to natural females.");