diff --git a/Eigen/src/Core/GenericPacketMath.h b/Eigen/src/Core/GenericPacketMath.h
index 39bba577a..ebae1a34f 100644
--- a/Eigen/src/Core/GenericPacketMath.h
+++ b/Eigen/src/Core/GenericPacketMath.h
@@ -58,6 +58,9 @@ struct default_packet_traits
     HasConj      = 1,
     HasSetLinear = 1,
     HasBlend     = 0,
+    // This flag is used to indicate whether packet comparison is supported.
+    // pcmp_eq, pcmp_lt and pcmp_le should be defined for it to be true.
+    HasCmp       = 0,
 
     HasDiv    = 0,
     HasSqrt   = 0,
diff --git a/Eigen/src/Core/arch/AVX/PacketMath.h b/Eigen/src/Core/arch/AVX/PacketMath.h
index b27a62cbc..b17c34015 100644
--- a/Eigen/src/Core/arch/AVX/PacketMath.h
+++ b/Eigen/src/Core/arch/AVX/PacketMath.h
@@ -63,6 +63,7 @@ template<> struct packet_traits<float>  : default_packet_traits
     size = 8,
     HasHalfPacket = 1,
 
+    HasCmp  = 1,
     HasDiv = 1,
     HasSin = EIGEN_FAST_MATH,
     HasCos = EIGEN_FAST_MATH,
@@ -93,6 +94,7 @@ template<> struct packet_traits<double> : default_packet_traits
     size=4,
     HasHalfPacket = 1,
 
+    HasCmp  = 1,
     HasDiv  = 1,
     HasExp  = 1,
     HasSqrt = 1,
diff --git a/Eigen/src/Core/arch/AVX512/PacketMath.h b/Eigen/src/Core/arch/AVX512/PacketMath.h
index ed15e0889..f55a50596 100644
--- a/Eigen/src/Core/arch/AVX512/PacketMath.h
+++ b/Eigen/src/Core/arch/AVX512/PacketMath.h
@@ -103,6 +103,7 @@ template<> struct packet_traits<float>  : default_packet_traits
     HasTanh = EIGEN_FAST_MATH,
     HasErf = EIGEN_FAST_MATH,
 #endif
+    HasCmp  = 1,
     HasDiv = 1
   };
  };
@@ -119,6 +120,7 @@ template<> struct packet_traits<double> : default_packet_traits
     HasSqrt = EIGEN_FAST_MATH,
     HasRsqrt = EIGEN_FAST_MATH,
 #endif
+    HasCmp  = 1,
     HasDiv = 1
   };
 };
@@ -1656,6 +1658,7 @@ struct packet_traits<bfloat16> : default_packet_traits {
     HasTanh = EIGEN_FAST_MATH,
     HasErf = EIGEN_FAST_MATH,
 #endif
+    HasCmp  = 1,
     HasDiv = 1
   };
 };
diff --git a/Eigen/src/Core/arch/SSE/PacketMath.h b/Eigen/src/Core/arch/SSE/PacketMath.h
index 9f2e922a2..1d640cf76 100755
--- a/Eigen/src/Core/arch/SSE/PacketMath.h
+++ b/Eigen/src/Core/arch/SSE/PacketMath.h
@@ -94,6 +94,7 @@ struct packet_traits<float> : default_packet_traits {
     size = 4,
     HasHalfPacket = 0,
 
+    HasCmp  = 1,
     HasDiv = 1,
     HasSin = EIGEN_FAST_MATH,
     HasCos = EIGEN_FAST_MATH,
@@ -128,6 +129,7 @@ struct packet_traits<double> : default_packet_traits {
     size=2,
     HasHalfPacket = 0,
 
+    HasCmp  = 1,
     HasDiv  = 1,
     HasExp  = 1,
     HasSqrt = 1,
diff --git a/Eigen/src/Core/functors/BinaryFunctors.h b/Eigen/src/Core/functors/BinaryFunctors.h
index 54bcddd34..d8b7b1eba 100644
--- a/Eigen/src/Core/functors/BinaryFunctors.h
+++ b/Eigen/src/Core/functors/BinaryFunctors.h
@@ -260,7 +260,7 @@ template<typename LhsScalar, typename RhsScalar, ComparisonName cmp>
 struct functor_traits<scalar_cmp_with_cast_op<LhsScalar,RhsScalar, cmp> > {
   enum {
     Cost = (NumTraits<LhsScalar>::AddCost+NumTraits<RhsScalar>::AddCost)/2,
-    PacketAccess = internal::is_same<LhsScalar, RhsScalar>::value && internal::is_same<LhsScalar, float>::value
+    PacketAccess = internal::is_same<LhsScalar, RhsScalar>::value && packet_traits<LhsScalar>::HasCmp
   };
 };