diff --git a/src/System.Net.Sockets/src/System.Net.Sockets.csproj b/src/System.Net.Sockets/src/System.Net.Sockets.csproj
index b27b2d9e6889..e29864b9aab1 100644
--- a/src/System.Net.Sockets/src/System.Net.Sockets.csproj
+++ b/src/System.Net.Sockets/src/System.Net.Sockets.csproj
@@ -7,7 +7,7 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPartialFacadeAssembly Condition="'$(TargetGroup)' == 'netfx'">true</IsPartialFacadeAssembly>
     <OmitResources Condition="'$(TargetGroup)' == 'netfx'">true</OmitResources>
-    <ILLinkClearInitLocals Condition="'$(OS)' == 'Windows_NT'">true</ILLinkClearInitLocals>
+    <ILLinkClearInitLocals>true</ILLinkClearInitLocals>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Unix-Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Unix-Release|AnyCPU'" />
diff --git a/src/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Unix.cs b/src/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Unix.cs
index 3367ac02594a..bd2d7b490365 100644
--- a/src/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Unix.cs
+++ b/src/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Unix.cs
@@ -47,7 +47,7 @@ private static unsafe IPPacketInformation GetIPPacketInformation(Interop.Sys.Mes
                 return default(IPPacketInformation);
             }
 
-            Interop.Sys.IPPacketInformation nativePacketInfo;
+            Interop.Sys.IPPacketInformation nativePacketInfo = default;
             if (!Interop.Sys.TryGetIPPacketInformation(messageHeader, isIPv4, &nativePacketInfo))
             {
                 return default(IPPacketInformation);
@@ -65,7 +65,7 @@ private static unsafe int Receive(SafeCloseSocket socket, SocketFlags flags, Spa
         {
             Debug.Assert(socketAddress != null || socketAddressLen == 0, $"Unexpected values: socketAddress={socketAddress}, socketAddressLen={socketAddressLen}");
 
-            long received;
+            long received = 0;
             int sockAddrLen = socketAddress != null ? socketAddressLen : 0;
 
             fixed (byte* sockAddr = socketAddress)
@@ -123,7 +123,7 @@ private static unsafe int Send(SafeCloseSocket socket, SocketFlags flags, ReadOn
                     IOVectorCount = 1
                 };
 
-                long bytesSent;
+                long bytesSent = 0;
                 errno = Interop.Sys.SendMessage(
                     socket.DangerousGetHandle(), // to minimize chances of handle recycling from misuse, this should use DangerousAddRef/Release, but it adds too much overhead
                     &messageHeader,
@@ -186,7 +186,7 @@ private static unsafe int Send(SafeCloseSocket socket, SocketFlags flags, IList<
                         IOVectorCount = iovCount
                     };
 
-                    long bytesSent;
+                    long bytesSent = 0;
                     errno = Interop.Sys.SendMessage(
                         socket.DangerousGetHandle(), // to minimize chances of handle recycling from misuse, this should use DangerousAddRef/Release, but it adds too much overhead
                         &messageHeader,
@@ -244,7 +244,7 @@ private static unsafe long SendFile(SafeCloseSocket socket, SafeFileHandle fileH
 
         private static unsafe int Receive(SafeCloseSocket socket, SocketFlags flags, IList<ArraySegment<byte>> buffers, byte[] socketAddress, ref int socketAddressLen, out SocketFlags receivedFlags, out Interop.Error errno)
         {
-            int available;
+            int available = 0;
             errno = Interop.Sys.GetBytesAvailable(socket, &available);
             if (errno != Interop.Error.SUCCESS)
             {
@@ -353,7 +353,7 @@ private static unsafe int ReceiveMessageFrom(SafeCloseSocket socket, SocketFlags
 
             Interop.Sys.MessageHeader messageHeader;
 
-            long received;
+            long received = 0;
             fixed (byte* rawSocketAddress = socketAddress)
             fixed (byte* b = &MemoryMarshal.GetReference(buffer))
             {
@@ -432,7 +432,7 @@ private static unsafe int ReceiveMessageFrom(
                         ControlBufferLen = cmsgBufferLen
                     };
 
-                    long received;
+                    long received = 0;
                     errno = Interop.Sys.ReceiveMessage(
                         socket.DangerousGetHandle(), // to minimize chances of handle recycling from misuse, this should use DangerousAddRef/Release, but it adds too much overhead
                         &messageHeader,
@@ -470,7 +470,7 @@ private static unsafe int ReceiveMessageFrom(
 
         public static unsafe bool TryCompleteAccept(SafeCloseSocket socket, byte[] socketAddress, ref int socketAddressLen, out IntPtr acceptedFd, out SocketError errorCode)
         {
-            IntPtr fd;
+            IntPtr fd = IntPtr.Zero;
             Interop.Error errno;
             int sockAddrLen = socketAddressLen;
             fixed (byte* rawSocketAddress = socketAddress)
@@ -545,7 +545,7 @@ public static unsafe bool TryStartConnect(SafeCloseSocket socket, byte[] socketA
 
         public static unsafe bool TryCompleteConnect(SafeCloseSocket socket, int socketAddressLen, out SocketError errorCode)
         {
-            Interop.Error socketError;
+            Interop.Error socketError = default;
             Interop.Error err;
             try
             {
@@ -1307,7 +1307,7 @@ public static unsafe SocketError GetMulticastOption(SafeCloseSocket handle, Sock
                 Interop.Sys.MulticastOption.MULTICAST_ADD :
                 Interop.Sys.MulticastOption.MULTICAST_DROP;
 
-            Interop.Sys.IPv4MulticastOption opt;
+            Interop.Sys.IPv4MulticastOption opt = default;
             Interop.Error err = Interop.Sys.GetIPv4MulticastOption(handle, optName, &opt);
             if (err != Interop.Error.SUCCESS)
             {
@@ -1332,7 +1332,7 @@ public static unsafe SocketError GetIPv6MulticastOption(SafeCloseSocket handle,
                 Interop.Sys.MulticastOption.MULTICAST_ADD :
                 Interop.Sys.MulticastOption.MULTICAST_DROP;
 
-            Interop.Sys.IPv6MulticastOption opt;
+            Interop.Sys.IPv6MulticastOption opt = default;
             Interop.Error err = Interop.Sys.GetIPv6MulticastOption(handle, optName, &opt);
             if (err != Interop.Error.SUCCESS)
             {