diff --git a/include/mysql.h b/include/mysql.h
index 515c3b87..4b10453a 100644
--- a/include/mysql.h
+++ b/include/mysql.h
@@ -331,6 +331,7 @@ typedef struct st_mysql_time
 
 #define AUTO_SEC_PART_DIGITS 31
 #define SEC_PART_DIGITS 6
+#define MARIADB_INVALID_SOCKET -1
 
 /* Ansynchronous API constants */
 #define MYSQL_WAIT_READ      1
diff --git a/libmariadb/libmariadb.c b/libmariadb/libmariadb.c
index 76c1e6ca..9afe1400 100644
--- a/libmariadb/libmariadb.c
+++ b/libmariadb/libmariadb.c
@@ -3551,7 +3551,7 @@ mysql_get_socket(const MYSQL *mysql)
 {
   if (mysql->net.vio)
     return vio_fd(mysql->net.vio);
-  return INVALID_SOCKET;
+  return MARIADB_INVALID_SOCKET;
 }
 
 /*