diff --git a/waterbox/melon/BizInterface.cpp b/waterbox/melon/BizInterface.cpp
index 66ce7320bb..5bfc4895ca 100644
--- a/waterbox/melon/BizInterface.cpp
+++ b/waterbox/melon/BizInterface.cpp
@@ -56,7 +56,7 @@ static void MicFeedNoise(u8 vol)
 
 	for (int i = 0; i < 735; i++)
 	{
-		biz_mic_input[i] = round(mic_blow[sampPos++] * (vol / 100.0));
+		biz_mic_input[i] = round((s16)mic_blow[sampPos++] * (vol / 100.0));
 		if (sampPos >= sampLen) sampPos = 0;
 	}
 }
diff --git a/waterbox/melon/melonDS b/waterbox/melon/melonDS
index 723bd95994..b1b24ac24a 160000
--- a/waterbox/melon/melonDS
+++ b/waterbox/melon/melonDS
@@ -1 +1 @@
-Subproject commit 723bd9599432943861cc4d8865f013043776382a
+Subproject commit b1b24ac24aabe4615ef252b414aeeff8ffb1650d