diff --git a/rtl/netware/sockets.pp b/rtl/netware/sockets.pp
index e94df17b2b..bb15295395 100644
--- a/rtl/netware/sockets.pp
+++ b/rtl/netware/sockets.pp
@@ -36,6 +36,11 @@ Type
   tsocklen=cint;
   psocklen=^tsocklen;
 
+const EsockEINTR  = WSAEINTR;
+      EsockEBADF  = WSAEBADF;
+      EsockEFAULT = WSAEFAULT;
+      EsockEINVAL = WSAEINVAL;
+
 {$i netwsockh.inc}
 {$i socketsh.inc}
 
diff --git a/rtl/netwlibc/sockets.pp b/rtl/netwlibc/sockets.pp
index 2da94f5bf7..3945c5e734 100644
--- a/rtl/netwlibc/sockets.pp
+++ b/rtl/netwlibc/sockets.pp
@@ -35,6 +35,10 @@ Type
   tsocklen=cint;
   psocklen=^tsocklen;
 
+const EsockEINTR  = WSAEINTR;
+      EsockEBADF  = WSAEBADF;
+      EsockEFAULT = WSAEFAULT;
+      EsockEINVAL = WSAEINVAL;
 
 {$i netwsockh.inc}
 {$i socketsh.inc}