diff --git a/ChangeLog b/ChangeLog
index 5aaddc4e2..f35fa3819 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ $Source$
 
 2003-11-12 Michal Cihar  <nijel@users.sourceforge.net>
     * libraries/export/latex.php3: Fixed LaTeX output (patch #840082).
+    * libraries/export/latex.php3: Unique fields are bold (patch #840089).
 
 2003-11-11 Garvin Hicking <antikarneval@supergarv.de>
     * libraries/display_tbl.lib.php3: Added more secure checks
diff --git a/libraries/export/latex.php3 b/libraries/export/latex.php3
index 0a82f912d..ba1bea949 100644
--- a/libraries/export/latex.php3
+++ b/libraries/export/latex.php3
@@ -232,6 +232,16 @@ function PMA_exportStructure($db, $table, $crlf, $error_url, $do_relation = fals
            $have_rel = FALSE;
     } // end if
 
+    /**
+     * Get the unique keys in the table
+     */
+    $keys_query     = 'SHOW KEYS FROM ' . PMA_backquote($table) . ' FROM '. PMA_backquote($db);
+    $keys_result    = PMA_mysql_query($keys_query) or PMA_mysqlDie('', $keys_query, '', $error_url);
+    $unique_keys    = array();
+    while($key = PMA_mysql_fetch_array($keys_result)) {
+        if ($key['Non_unique'] == 0) $unique_keys[] = $key['Column_name'];
+    }
+
     /**
      * Displays the table structure
      */
@@ -358,6 +368,10 @@ function PMA_exportStructure($db, $table, $crlf, $error_url, $do_relation = fals
             $pos=strpos($local_buffer, "\000");
             $local_buffer = '\\textit{' . substr($local_buffer,0,$pos) . '}' . substr($local_buffer,$pos);
         }
+        if (in_array($field_name, $unique_keys)) {
+            $pos=strpos($local_buffer, "\000");
+            $local_buffer = '\\textbf{' . substr($local_buffer,0,$pos) . '}' . substr($local_buffer,$pos);
+        }
         $buffer = str_replace("\000", ' & ', $local_buffer);
         $buffer .= ' \\\\ \\hline ' . $crlf;