diff --git a/README/ReleaseNotes/v642/index.md b/README/ReleaseNotes/v642/index.md
index 61c80c9c5b822..6d173068f81c8 100644
--- a/README/ReleaseNotes/v642/index.md
+++ b/README/ReleaseNotes/v642/index.md
@@ -77,6 +77,7 @@ The `TMVA_SOFIE_GNN` tutorials have been migrated to this workflow and produce i
 * The header `GLConstants.h` is no longer part of ROOT installed headers.
 * The header `PosixThreadInc.h` is deprecated and will be removed after ROOT 6.44. Use instead `<ctime>` and `<cstdlib>`.
 * The header `RStringView.h` deprecated in ROOT 6.14  will now emit warnings and will be fully removed after ROOT 6.44. Use `ROOT/RStringView.hxx` instead.
+* The header `NetErrors.h` is an implementation detail, is deprecated and will be removed in ROOT 6.44. Use instead `TSocket` public interface.
 * The header `snprintf.h` is deprecated (will emit warnings) and will be removed in ROOT 6.44. Use instead `<cstdio>`.
 * The header `Strlen.h` is deprecated and will be removed in ROOT 6.44. Use `<cstring>` directly as a replacement. `NEED_STRING` macro should not be defined or an error will be raised.
 * The header `Varargs.h` and the macro `R__VA_COPY` are deprecated and will be removed in ROOT 6.46, use `<cstdarg>` instead.
diff --git a/net/net/inc/NetErrors.h b/net/net/inc/NetErrors.h
index 3426b5ea12f79..526cad67f8f32 100644
--- a/net/net/inc/NetErrors.h
+++ b/net/net/inc/NetErrors.h
@@ -13,6 +13,10 @@
 #define ROOT_NetErrors
 
 
+#if !defined(ROOT_NetErrors_cxx) && !defined(G__DICTIONARY)
+#warning "This header is deprecated and will be removed from the public interface in ROOT 6.44. Use instead TSocket public interface."
+#endif
+
 //////////////////////////////////////////////////////////////////////////
 //                                                                      //
 // NetErrors                                                            //
diff --git a/net/net/src/NetErrors.cxx b/net/net/src/NetErrors.cxx
index a356a38a22272..85460bca3edc2 100644
--- a/net/net/src/NetErrors.cxx
+++ b/net/net/src/NetErrors.cxx
@@ -18,6 +18,7 @@
 //                                                                      //
 //////////////////////////////////////////////////////////////////////////
 
+#define ROOT_NetErrors_cxx
 #include "NetErrors.h"
 
 // Must match order of ERootdErrors enum in NetErrors.h
diff --git a/net/net/src/TSocket.cxx b/net/net/src/TSocket.cxx
index 8947ae1de0a38..c75255f6375de 100644
--- a/net/net/src/TSocket.cxx
+++ b/net/net/src/TSocket.cxx
@@ -23,6 +23,7 @@ TUnixSystem or TWinNTSystem).
 
 #include "Bytes.h"
 #include "Compression.h"
+#define ROOT_NetErrors_cxx
 #include "NetErrors.h"
 #include "TError.h"
 #include "TMessage.h"
diff --git a/net/net/src/TUDPSocket.cxx b/net/net/src/TUDPSocket.cxx
index 2611494f79dd7..7bf568d7da90b 100644
--- a/net/net/src/TUDPSocket.cxx
+++ b/net/net/src/TUDPSocket.cxx
@@ -22,6 +22,7 @@ TUnixSystem or TWinNTSystem).
 
 #include "Bytes.h"
 #include "Compression.h"
+#define ROOT_NetErrors_cxx
 #include "NetErrors.h"
 #include "TError.h"
 #include "TMessage.h"