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-rw-r--r--src/3rdparty/masm/yarr/YarrPattern.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/3rdparty/masm/yarr/YarrPattern.h b/src/3rdparty/masm/yarr/YarrPattern.h
index 59decbac46..f7ddf861ba 100644
--- a/src/3rdparty/masm/yarr/YarrPattern.h
+++ b/src/3rdparty/masm/yarr/YarrPattern.h
@@ -31,6 +31,7 @@
#include "YarrUnicodeProperties.h"
#include <wtf/CheckedArithmetic.h>
#include <wtf/HashMap.h>
+#include <wtf/Optional.h>
#include <wtf/PrintStream.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>