diff --git a/src/EditorFeatures/CSharp/BlockCommentEditing/BlockCommentEditingCommandHandler.cs b/src/EditorFeatures/CSharp/BlockCommentEditing/BlockCommentEditingCommandHandler.cs
index 13c126937f219ab7e890bb7b8e222c2d5d48ae04..3fbb0cfaf7dc53ecd717858d1c65d89f74381064 100644
--- a/src/EditorFeatures/CSharp/BlockCommentEditing/BlockCommentEditingCommandHandler.cs
+++ b/src/EditorFeatures/CSharp/BlockCommentEditing/BlockCommentEditingCommandHandler.cs
@@ -82,7 +82,7 @@ private Span GetReplacementSpan(SnapshotPoint caretPosition)
             var snapshot = caretPosition.Snapshot;
             var start = caretPosition.Position;
             var end = caretPosition;
-            while (end < snapshot.Length && char.IsWhiteSpace(end.GetChar()) && !SyntaxFacts.IsNewLine(end.GetChar()))
+            while (end < snapshot.Length && SyntaxFacts.IsWhitespace(end.GetChar()) && !SyntaxFacts.IsNewLine(end.GetChar()))
                 end = end + 1;
 
             return Span.FromBounds(start, end);