diff --git a/phsource/ph_vietnam b/phsource/ph_vietnam
index ad973fd5..7c4f1252 100644
--- a/phsource/ph_vietnam
+++ b/phsource/ph_vietnam
@@ -206,7 +206,7 @@ phoneme i
   FMT(vietnam/i)
   ELSE
 	//FMT(vowel/i_4)
-	FMT(vietnam/i_2, 150)
+	FMT(vietnam/i_2, 100)
 ENDIF
 endphoneme
 
@@ -755,7 +755,7 @@ phoneme k
   lengthmod 3
   IF nextPhW(#u) THEN
   Vowelin f1=1  f2=600 -200 -400  f3=-200 80 amp=200 len=30 rms=200
-  WAV(vietnam/c_2)
+  WAV(vietnam/c_2, 255)
   ELSE
   Vowelin f1=0  f2=2300 200 400  f3=200 80 len=30
   WAV(vietnam/c)