diff --git a/ChangeLog b/ChangeLog
index 98be6f549..b71419ee4 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,9 @@ $Source$
 
 2003-10-31 Marc Delisle  <lem9@users.sourceforge.net>
     * lang/romanian: Updated, thanks to Valics Lehel.
+    * tbl_relation.php3: add backquotes around table and field names
+      in queries for InnoDB foreign keys; however, in current MySQL 4.0.16
+      version, a blank character in a field name is not accepted by InnoDB
 
 2003-10-27 Marc Delisle  <lem9@users.sourceforge.net>
     * querywindow.php3: bug 825668: js errors in SQL-history,
diff --git a/tbl_relation.php3 b/tbl_relation.php3
index e32b124e8..d771d5d4b 100644
--- a/tbl_relation.php3
+++ b/tbl_relation.php3
@@ -121,10 +121,10 @@ if ($cfgRelation['relwork']
                     // could be put in an include file
                     $upd_query  = 'ALTER TABLE ' . $table 
                                 . ' ADD FOREIGN KEY ('
-                                . PMA_sqlAddslashes($master_field) . ')'
+                                . PMA_backquote(PMA_sqlAddslashes($master_field)) . ')'
                                 . ' REFERENCES '
-                                . PMA_sqlAddslashes($foreign_table) . '('
-                                . PMA_sqlAddslashes($foreign_field) . ')'; 
+                                . PMA_backquote(PMA_sqlAddslashes($foreign_table)) . '('
+                                . PMA_backquote(PMA_sqlAddslashes($foreign_field)) . ')'; 
 
                     if (${$master_field . '_on_delete'} != 'nix') {
                         $upd_query   .= ' ON DELETE ' . $options_array[${$master_field . '_on_delete'}];
@@ -147,7 +147,7 @@ if ($cfgRelation['relwork']
                     if (PMA_MYSQL_INT_VERSION >= 40013) {
                         $upd_query  = 'ALTER TABLE ' . $table 
                                     . ' DROP FOREIGN KEY '
-                                    . $existrel_innodb[$master_field]['constraint'];
+                                    . PMA_backquote($existrel_innodb[$master_field]['constraint']);
 
                         // I tried to send both in one query but it failed
                         $upd_rs         = PMA_mysql_query($upd_query);
@@ -156,10 +156,10 @@ if ($cfgRelation['relwork']
                     // add another
                     $upd_query  = 'ALTER TABLE ' . $table 
                                 . ' ADD FOREIGN KEY ('
-                                . PMA_sqlAddslashes($master_field) . ')'
+                                . PMA_backquote(PMA_sqlAddslashes($master_field)) . ')'
                                 . ' REFERENCES '
-                                . PMA_sqlAddslashes($foreign_table) . '('
-                                . PMA_sqlAddslashes($foreign_field) . ')'; 
+                                . PMA_backquote(PMA_sqlAddslashes($foreign_table)) . '('
+                                . PMA_backquote(PMA_sqlAddslashes($foreign_field)) . ')'; 
 
                     if (${$master_field . '_on_delete'} != 'nix') {
                         $upd_query   .= ' ON DELETE ' . $options_array[${$master_field . '_on_delete'}];
@@ -173,7 +173,7 @@ if ($cfgRelation['relwork']
                     if (PMA_MYSQL_INT_VERSION >= 40013) {
                         $upd_query  = 'ALTER TABLE ' . $table 
                                 . ' DROP FOREIGN KEY '
-                                . $existrel_innodb[$master_field]['constraint'];
+                                . PMA_backquote($existrel_innodb[$master_field]['constraint']);
                     }
             } // end if... else....