diff --git a/src/js/physicalDevelopment.js b/src/js/physicalDevelopment.js
index 335065545626afabe73cbe4983d0ea3b505f7177..bff64241ff9589307f9c54d8a879c827d0a2ef9b 100644
--- a/src/js/physicalDevelopment.js
+++ b/src/js/physicalDevelopment.js
@@ -20,7 +20,9 @@ window.physicalDevelopment = (function physicalDevelopment() {
 				increaseHeightXX(slave);
 				if (slave.physicalAge === 13) {
 					increaseFaceXX(slave);
-					increaseVoiceXX(slave);
+					if (slave.voice > 0) {
+					    increaseVoiceXX(slave);
+					}
 				}
 				increaseBoobsXX(slave);
 				if (slave.clit > 0) {
@@ -34,7 +36,9 @@ window.physicalDevelopment = (function physicalDevelopment() {
 				increaseHeightXY(slave);
 				if (slave.physicalAge === 13) {
 					increaseFaceXY(slave);
-					increaseVoiceXY(slave);
+					if (slave.voice > 1) {
+					    increaseVoiceXY(slave);
+					}
 				}
 				increaseBoobsXY(slave);
 				if (slave.dick > 0) {