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-rw-r--r--layout/style/nsCSSScanner.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/layout/style/nsCSSScanner.cpp b/layout/style/nsCSSScanner.cpp
index 2110be78c..b1524a3bb 100644
--- a/layout/style/nsCSSScanner.cpp
+++ b/layout/style/nsCSSScanner.cpp
@@ -14,6 +14,8 @@
#include "mozilla/Likely.h"
#include <algorithm>
+using mozilla::IsNaN;
+
/* Character class tables and related helper functions. */
static const uint8_t IS_HEX_DIGIT = 0x01;