diff --git a/mcs/class/System/Mono.AppleTls/AppleTlsContext.cs b/mcs/class/System/Mono.AppleTls/AppleTlsContext.cs
index 0cc69e47648..51ded713ba6 100644
--- a/mcs/class/System/Mono.AppleTls/AppleTlsContext.cs
+++ b/mcs/class/System/Mono.AppleTls/AppleTlsContext.cs
@@ -775,7 +775,7 @@ namespace Mono.AppleTls
 		[DllImport (SecurityLibrary)]
 		extern unsafe static /* OSStatus */ SslStatus SSLRead (/* SSLContextRef */ IntPtr context, /* const void* */ byte* data, /* size_t */ IntPtr dataLength, /* size_t* */ out IntPtr processed);
 
-		public override unsafe (int ret, bool wantMore) Read (byte[] buffer, int offset, int count)
+		public override unsafe System.ValueTuple<int, bool> Read (byte[] buffer, int offset, int count)
 		{
 			if (Interlocked.Exchange (ref pendingIO, 1) == 1)
 				throw new InvalidOperationException ();
@@ -816,7 +816,7 @@ namespace Mono.AppleTls
 		[DllImport (SecurityLibrary)]
 		extern unsafe static /* OSStatus */ SslStatus SSLWrite (/* SSLContextRef */ IntPtr context, /* const void* */ byte* data, /* size_t */ IntPtr dataLength, /* size_t* */ out IntPtr processed);
 
-		public override unsafe (int ret, bool wantMore) Write (byte[] buffer, int offset, int count)
+		public override unsafe System.ValueTuple<int, bool> Write (byte[] buffer, int offset, int count)
 		{
 			if (Interlocked.Exchange (ref pendingIO, 1) == 1)
 				throw new InvalidOperationException ();
diff --git a/mcs/class/System/Mono.Btls/MonoBtlsContext.cs b/mcs/class/System/Mono.Btls/MonoBtlsContext.cs
index 559db4aca5d..b70239c5163 100644
--- a/mcs/class/System/Mono.Btls/MonoBtlsContext.cs
+++ b/mcs/class/System/Mono.Btls/MonoBtlsContext.cs
@@ -300,7 +300,7 @@ namespace Mono.Btls
 			throw new NotImplementedException ();
 		}
 
-		public override (int ret, bool wantMore) Read (byte[] buffer, int offset, int size)
+		public override System.ValueTuple<int, bool> Read (byte[] buffer, int offset, int size)
 		{
 			Debug ("Read: {0} {1} {2}", buffer.Length, offset, size);
 
@@ -329,7 +329,7 @@ namespace Mono.Btls
 			}
 		}
 
-		public override (int ret, bool wantMore) Write (byte[] buffer, int offset, int size)
+		public override System.ValueTuple<int, bool> Write (byte[] buffer, int offset, int size)
 		{
 			Debug ("Write: {0} {1} {2}", buffer.Length, offset, size);
 
diff --git a/mcs/class/System/Mono.Net.Security/MobileTlsContext.cs b/mcs/class/System/Mono.Net.Security/MobileTlsContext.cs
index 74410976a85..46f0eb59b9c 100644
--- a/mcs/class/System/Mono.Net.Security/MobileTlsContext.cs
+++ b/mcs/class/System/Mono.Net.Security/MobileTlsContext.cs
@@ -165,9 +165,9 @@ namespace Mono.Net.Security
 
 		public abstract void Flush ();
 
-		public abstract (int ret, bool wantMore) Read (byte[] buffer, int offset, int count);
+		public abstract System.ValueTuple<int, bool> Read (byte[] buffer, int offset, int count);
 
-		public abstract (int ret, bool wantMore) Write (byte[] buffer, int offset, int count);
+		public abstract System.ValueTuple<int, bool> Write (byte[] buffer, int offset, int count);
 
 		public abstract void Shutdown ();