diff --git a/headers/os/interface/AffineTransform.h b/headers/os/interface/AffineTransform.h
index 91bcdebd88..516d473442 100644
--- a/headers/os/interface/AffineTransform.h
+++ b/headers/os/interface/AffineTransform.h
@@ -33,7 +33,11 @@
 class BAffineTransform : public BFlattenable {
 public:
 
+#if __cplusplus < 201103L
 	static	const double			kDefaultEpsilon = 1e-14;
+#else
+	static	constexpr double		kDefaultEpsilon = 1e-14;
+#endif
 
 public:
 									BAffineTransform();