diff --git a/phsource/ph_vietnam b/phsource/ph_vietnam
index 64c2087e..02083116 100644
--- a/phsource/ph_vietnam
+++ b/phsource/ph_vietnam
@@ -904,4 +904,25 @@ phoneme n^ // (a)nh
     ENDIF
     FMT(vietnam/n^_)	
   ENDIF
-endphoneme
\ No newline at end of file
+endphoneme
+
+phoneme h
+  vls glt frc
+  lengthmod 3
+  ipa h
+   
+  IF nextPh(#@) THEN
+    WAV(h/h@)
+  ELIF nextPh(#a) THEN
+    WAV(h/ha)
+  ELIF nextPh(#e) THEN
+    WAV(h/he)
+  ELIF nextPh(#i) THEN
+    WAV(h/hi)
+  ELIF nextPh(#o) THEN
+    WAV(h/ho)
+  ELIF nextPh(#u) THEN
+    WAV(vietnam/hu, 25)
+  ENDIF
+  WAV(h/h_, 70)  // no vowel following
+endphoneme
diff --git a/phsource/vietnam/hu.wav b/phsource/vietnam/hu.wav
new file mode 100644
index 00000000..c83eaf7d
Binary files /dev/null and b/phsource/vietnam/hu.wav differ