diff --git a/dictsource/be_rules b/dictsource/be_rules
index f07df688..52983a82 100644
--- a/dictsource/be_rules
+++ b/dictsource/be_rules
@@ -80,7 +80,7 @@
        з (L06L04 z;
        з (ці   s;
 
-.group і
+.group і       // NOTE: appends ";" at the end of the words when next starts from "а"
        і       i
     C) і       ;i
 
diff --git a/phsource/ph_belarusian b/phsource/ph_belarusian
index ec7db29a..ba87e51d 100644
--- a/phsource/ph_belarusian
+++ b/phsource/ph_belarusian
@@ -72,6 +72,16 @@ phoneme r
   FMT(r3/r_trill2) addWav(r3/r_trill2.wav, 65)
 endphoneme
 
+phoneme s;
+  import_phoneme base1/s;
+  ipa sʲ
+endphoneme
+
+phoneme z;
+  import_phoneme base1/z;
+  ipa zʲ
+endphoneme
+
 phoneme ;
   liquid pzd
   lengthmod 0