diff --git a/test/packetmath.cpp b/test/packetmath.cpp
index 121ec7283..f29417b98 100644
--- a/test/packetmath.cpp
+++ b/test/packetmath.cpp
@@ -353,10 +353,10 @@ template <typename Scalar, typename Packet>
 void packetmath_minus_zero_add() {
   const int PacketSize = internal::unpacket_traits<Packet>::size;
   const int size = 2 * PacketSize;
-  EIGEN_ALIGN_MAX Scalar data1[size];
-  EIGEN_ALIGN_MAX Scalar data2[size];
-  EIGEN_ALIGN_MAX Scalar ref[size];
-
+  EIGEN_ALIGN_MAX Scalar data1[size] = {};
+  EIGEN_ALIGN_MAX Scalar data2[size] = {};
+  EIGEN_ALIGN_MAX Scalar ref[size] = {};
+  
   for (int i = 0; i < PacketSize; ++i) {
     data1[i] = Scalar(-0.0);
     data1[i + PacketSize] = Scalar(-0.0);