diff --git a/headers/posix/netdb.h b/headers/posix/netdb.h
index 26cb35e389..0693a217fc 100644
--- a/headers/posix/netdb.h
+++ b/headers/posix/netdb.h
@@ -21,7 +21,6 @@ extern "C" {
 #define NO_DATA 4
 
 #ifndef h_errno
-extern int h_errno;
 extern int *_h_errnop(void);
 #define h_errno (*_h_errnop())
 #endif /* h_errno */
diff --git a/src/kits/network/libnet/compat.c b/src/kits/network/libnet/compat.c
index 6a51d857bb..939110fea8 100644
--- a/src/kits/network/libnet/compat.c
+++ b/src/kits/network/libnet/compat.c
@@ -13,6 +13,7 @@
 
 #include <TLS.h>
 
+extern int h_errno;
 #undef h_errno
 	// was defined by netdb.h
 static int32 h_errno_tls;
diff --git a/src/kits/network/libnet/getaddrinfo.c b/src/kits/network/libnet/getaddrinfo.c
index 1e01ba4a26..73ed708fe2 100644
--- a/src/kits/network/libnet/getaddrinfo.c
+++ b/src/kits/network/libnet/getaddrinfo.c
@@ -98,6 +98,7 @@
 
 #undef h_errno
 	// was defined by netdb.h
+extern int h_errno;
 
 #ifdef YP
 #include <rpc/rpc.h>
@@ -1517,7 +1518,6 @@ _yp_getaddrinfo(name, pai)
 /* resolver logic */
 
 extern const char *__hostalias (const char *);
-extern int h_errno;
 extern int res_opt (int, u_char *, int, int);
 
 /*
diff --git a/src/kits/network/libnet/getnameinfo.c b/src/kits/network/libnet/getnameinfo.c
index 52abcb1bd9..386093fd04 100644
--- a/src/kits/network/libnet/getnameinfo.c
+++ b/src/kits/network/libnet/getnameinfo.c
@@ -54,6 +54,7 @@
 
 #undef h_errno
 	// was defined by netdb.h
+extern int h_errno;
 
 static const struct afd {
 	int a_af;
diff --git a/src/kits/network/libnet/res_debug.c b/src/kits/network/libnet/res_debug.c
index dc16b3b671..feea41ad7f 100644
--- a/src/kits/network/libnet/res_debug.c
+++ b/src/kits/network/libnet/res_debug.c
@@ -93,6 +93,7 @@
 
 #undef h_errno
 	// was defined by netdb.h
+extern int h_errno;
 
 extern const char *_res_opcodes[];
 extern const char *_res_resultcodes[];
diff --git a/src/kits/network/libnet/res_mkquery.c b/src/kits/network/libnet/res_mkquery.c
index eca7749a45..6062f8fe6b 100644
--- a/src/kits/network/libnet/res_mkquery.c
+++ b/src/kits/network/libnet/res_mkquery.c
@@ -66,6 +66,7 @@
 
 #undef h_errno
 	// was defined by netdb.h
+extern int h_errno;
 
 /*
  * Form all types of queries.