diff --git a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
index af688cd946ba8af3d635810ec41caa33e8151250..51a42d5ceac5313303a2b60e040c2a6886a7d69b 100644
--- a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
+++ b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
@@ -43,7 +43,7 @@ internal sealed class RegexPatternDetector
/// Option names are the values from the enum.
///
private static readonly Regex s_languageCommentDetector =
- new Regex(@"\blang(uage)?\s*=\s*regex(p)?\b((\s*,\s*)(?