diff --git a/CodeCompletion/DomSyntaxTreeVisitor.cs b/CodeCompletion/DomSyntaxTreeVisitor.cs
index 8dc393660..9f2dda815 100644
--- a/CodeCompletion/DomSyntaxTreeVisitor.cs
+++ b/CodeCompletion/DomSyntaxTreeVisitor.cs
@@ -2905,7 +2905,10 @@ namespace CodeCompletion
                         TypeScope tmp_awaitedProcType = awaitedProcType;
                         if (ps.parameters != null && ps.parameters.Count > i + (ps.IsExtension ? 1 : 0))
                             awaitedProcType = ps.parameters[i + (ps.IsExtension ? 1 : 0)].sc as TypeScope;
+                        bool tmp_disable_lambda_compilation = disable_lambda_compilation;
+                        disable_lambda_compilation = false;
                         e.visit(this);
+                        disable_lambda_compilation = tmp_disable_lambda_compilation;
                         awaitedProcType = tmp_awaitedProcType;
                     }
                 }
diff --git a/TestSuite/intellisense_tests/lambdas4.pas b/TestSuite/intellisense_tests/lambdas4.pas
new file mode 100644
index 000000000..25e56ded6
--- /dev/null
+++ b/TestSuite/intellisense_tests/lambdas4.pas
@@ -0,0 +1,7 @@
+procedure p1(b: sequence of byte) := exit;
+
+begin
+  var hs := new HashSet<byte>;
+  p1(hs.Select(a -> a{@parameter a: byte;@}));
+
+end.
\ No newline at end of file