diff --git a/Eigen/src/Core/arch/AVX512/PacketMath.h b/Eigen/src/Core/arch/AVX512/PacketMath.h
index af3109a7b..d3b1eea06 100644
--- a/Eigen/src/Core/arch/AVX512/PacketMath.h
+++ b/Eigen/src/Core/arch/AVX512/PacketMath.h
@@ -98,19 +98,19 @@ template <>
 struct unpacket_traits<Packet16f> {
   typedef float type;
   typedef Packet8f half;
-  enum { size = 16 };
+  enum { size = 16, alignment=Aligned64 };
 };
 template <>
 struct unpacket_traits<Packet8d> {
   typedef double type;
   typedef Packet4d half;
-  enum { size = 8 };
+  enum { size = 8, alignment=Aligned64 };
 };
 template <>
 struct unpacket_traits<Packet16i> {
   typedef int type;
   typedef Packet8i half;
-  enum { size = 16 };
+  enum { size = 16, alignment=Aligned64 };
 };
 
 template <>