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-rw-r--r--Source/WebCore/css/StyleSheetContents.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/Source/WebCore/css/StyleSheetContents.h b/Source/WebCore/css/StyleSheetContents.h
index f25662172..376e47951 100644
--- a/Source/WebCore/css/StyleSheetContents.h
+++ b/Source/WebCore/css/StyleSheetContents.h
@@ -30,6 +30,7 @@
#include <wtf/Vector.h>
#include <wtf/text/AtomicStringHash.h>
#include <wtf/text/TextPosition.h>
+#include <functional>
namespace WebCore {