diff --git a/pdal/Mesh.hpp b/pdal/Mesh.hpp
index ca1afa6c22..920f65e8b3 100644
--- a/pdal/Mesh.hpp
+++ b/pdal/Mesh.hpp
@@ -55,8 +55,8 @@ class PDAL_DLL Triangle
 
 inline bool operator == (const Triangle& a, const Triangle& b)
 {
-    std::array<PointId, 3> aa {a.m_a, a.m_b, a.m_c};
-    std::array<PointId, 3> bb {b.m_a, b.m_b, b.m_c};
+    std::array<PointId, 3> aa { {a.m_a, a.m_b, a.m_c} };
+    std::array<PointId, 3> bb { {b.m_a, b.m_b, b.m_c} };
     std::sort(aa.begin(), aa.end());
     std::sort(bb.begin(), bb.end());
     return aa == bb;