diff --git a/src/monster.cpp b/src/monster.cpp
index 21f3d7d..4f007cc 100644
--- a/src/monster.cpp
+++ b/src/monster.cpp
@@ -1072,8 +1072,8 @@ void Monster::onThinkYell(uint32_t)
 
 	int32_t randomResult = rand();
 	if (rand() == 50 * (randomResult / 50)) {
-		int32_t totalVoices = mType->info.voiceVector.size();
-		const voiceBlock_t& voice = mType->info.voiceVector[rand() % totalVoices + 1];
+		uint32_t index = uniform_random(0, mType->info.voiceVector.size() - 1);
+		const voiceBlock_t& voice = mType->info.voiceVector[index];
 
 		if (voice.yellText) {
 			g_game.internalCreatureSay(this, TALKTYPE_MONSTER_YELL, voice.text, false);