diff --git a/include/my_net.h b/include/my_net.h
index 7b42afa1f3a..71914964e46 100644
--- a/include/my_net.h
+++ b/include/my_net.h
@@ -72,6 +72,11 @@ C_MODE_START
 #define in_addr_t uint32
 #endif
 
+/* On some operating systems (e.g. Solaris) INADDR_NONE is not defined */
+#ifndef INADDR_NONE
+#define INADDR_NONE -1                          /* Error value from inet_addr */
+#endif
+
 /* Thread safe or portable version of some functions */
 
 void my_inet_ntoa(struct in_addr in, char *buf);
diff --git a/sql-common/client.c b/sql-common/client.c
index fd65ed01462..8b61589023f 100644
--- a/sql-common/client.c
+++ b/sql-common/client.c
@@ -98,9 +98,6 @@ my_bool	net_flush(NET *net);
 #  include <sys/un.h>
 #endif
 
-#ifndef INADDR_NONE
-#define INADDR_NONE	-1
-#endif
 #if defined(MSDOS) || defined(__WIN__)
 #define perror(A)
 #else
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 6accb745648..d0c3cb826d9 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -78,10 +78,6 @@
 #define IF_PURIFY(A,B) (B)
 #endif
 
-#ifndef INADDR_NONE
-#define INADDR_NONE -1				// Error value from inet_addr
-#endif
-
 /* stack traces are only supported on linux intel */
 #if defined(__linux__)  && defined(__i386__) && defined(USE_PSTACK)
 #define	HAVE_STACK_TRACE_ON_SEGV
@@ -111,6 +107,7 @@ extern "C" {					// Because of SCO 3.2V4.2
 #ifdef HAVE_GRP_H
 #include <grp.h>
 #endif
+#include <my_net.h>
 
 #if defined(OS2)
 #  include <sys/un.h>