diff --git a/src/fst/morphology/phonology.twolc b/src/fst/morphology/phonology.twolc
index 478e4e42..ccbe94f4 100644
--- a/src/fst/morphology/phonology.twolc
+++ b/src/fst/morphology/phonology.twolc
@@ -140,6 +140,7 @@ Alphabet !!≈!!The base @CODE@
 %^Devoice:0	!!= @CODE@ for devoicing изь:исть
 %^PXSG1:0	!!= @CODE@ кядне, ярмаконе не vs %{ЕОØ%}не
 %^CnsSt:0	!!= @CODE@ улемс:уль%^CnsSt%>%{АЕØ%}	
+%^Glide:0	!!= @CODE@ Толстой:Толстой%^Glide%>нь
 
 TLoss:0
 SLoss:0
@@ -1266,6 +1267,10 @@ KLoss:0 /<= [[ :* Letters ] - [ :* :к ] ] %> _ ;
 !! **@RULENAME@**  
 SLoss:0 /<= [[ :* Letters ] - [ :* :с ] ] %> _ ;
 
+"Disallow Glide after non-glides"
+!! **@RULENAME@**
+%^Glide:0 /<= [[ :* Letters ] - [ :* й ] ] _ ;
+
 !"Disallow VLoss after non-U2I2"
 !!! __@RULENAME@__  
 !VLoss:0 /<= [[ :* [ Letters | А1: | %{АЯ%}: | %{ИЫЙ%}: | К1:  | %{ЬØ%}: | %{гк%}: | %{вгк%}: | К3:  ] ] - [ :* [ У2: | И2: ] ] ] %> _ ;
diff --git a/src/fst/morphology/root.lexc b/src/fst/morphology/root.lexc
index d5370c05..2fbfa068 100644
--- a/src/fst/morphology/root.lexc
+++ b/src/fst/morphology/root.lexc
@@ -94,6 +94,7 @@ Multichar_Symbols !!≈!!@CODE@ / Analysis symbols
  +Err/Orth-soft-loss !!≈ * @CODE@ $тиендсазь €тиендьсазь
  +Err/Orth-soft-kept !!≈ * @CODE@ шяярьня
  +Err/Orth-colloq !!≈ * @CODE@ Евсеич
+ +Err/Orth-glide-final !!≈ * @CODE@ Толстойнь, 
  +Err/MissingSpace
  +Err/Orth-old1 !!≈ * @CODE@ * old1 like озимь, морковь 1930–1940
  +Err/Orth-pre1978  !!≈ * @CODE@ * orthography preceding 1978
@@ -689,6 +690,7 @@ Multichar_Symbols !!≈!!@CODE@ / Analysis symbols
 %^Devoice	!!= @CODE@ for devoicing изь:исть
 %^PXSG1		!!= @CODE@ кядне, ярмаконе не vs %{ЕОØ%}не
 %^CnsSt		!!= @CODE@ улемс:уль%^CnsSt%>%{АЕØ%}	
+%^Glide		!!= @CODE@ Толстой:Толстой%^Glide%>нь
 
  {front} {back}
  %>