diff --git a/ChangeLog b/ChangeLog
index 18cb0e042..59cf773ad 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -17,6 +17,7 @@ $Source$
     * libraries/config_import.lib.php3, lang/*, config.inc.php3,
       db_details_structure.php3, pdf_pages.php3, pdf_schema.php3: User can
       select paper size for pdf (RFE #631551).
+    * read_dump.php3: Fixed undefined variable warning (bug #750070).
 
 2003-06-05 Marc Delisle  <lem9@users.sourceforge.net>
     * Documentation.html: new faq 6.20 about CREATE TEMPORARY TABLES
diff --git a/read_dump.php3 b/read_dump.php3
index df794d3d1..e1c01418e 100644
--- a/read_dump.php3
+++ b/read_dump.php3
@@ -84,6 +84,8 @@ if ($sql_file != 'none') {
             $open_basedir = @get_cfg_var('open_basedir');
         }
 
+        if (!isset($sql_file_compression)) $sql_file_compression = '';
+
         // If we are on a server with open_basedir, we must move the file
         // before opening it. The doc explains how to create the "./tmp"
         // directory