diff --git a/packages/pastojs/src/pas2jsfiler.pp b/packages/pastojs/src/pas2jsfiler.pp
index 040f3dacef..ff5c715f7b 100644
--- a/packages/pastojs/src/pas2jsfiler.pp
+++ b/packages/pastojs/src/pas2jsfiler.pp
@@ -431,7 +431,8 @@ const
     'LogicalNot',
     'LogicalXor',
     'RightShift',
-    'Enumerator'
+    'Enumerator',
+    'In'
     );
 
   PCUProcedureModifierNames: array[TProcedureModifier] of string = (