diff --git a/importexport/inc/class.importexport_helper_functions.inc.php b/importexport/inc/class.importexport_helper_functions.inc.php
index 4fb1cea44a..5c0a9eb4d0 100755
--- a/importexport/inc/class.importexport_helper_functions.inc.php
+++ b/importexport/inc/class.importexport_helper_functions.inc.php
@@ -21,6 +21,11 @@ class importexport_helper_functions {
 	 */
 	const CACHE_EXPIRATION = 3600;
 
+	/**
+	 * Make no changes (automatic category creation)
+	 */
+	public static $dry_run = false;
+
 	/**
 	* Files known to cause problems, and will be skipped in a plugin scan
 	* If you put appname => true, the whole app will be skipped.
@@ -187,7 +192,7 @@ class importexport_helper_functions {
 		foreach ( $cat_names as $cat_name ) {
 			$cat_name = trim($cat_name);
 			if ( $cat_name == '' ) continue;
-			if ( ( $cat_id = $cats->name2id( $cat_name ) ) == 0 ) {
+			if ( ( $cat_id = $cats->name2id( $cat_name ) ) == 0 && !self::$dry_run) {
 				$cat_id = $cats->add( array(
 					'name' => $cat_name,
 					'parent' => $parent,
diff --git a/importexport/inc/class.importexport_import_ui.inc.php b/importexport/inc/class.importexport_import_ui.inc.php
index 748c4cdbe0..39d15a2539 100644
--- a/importexport/inc/class.importexport_import_ui.inc.php
+++ b/importexport/inc/class.importexport_import_ui.inc.php
@@ -97,6 +97,7 @@
 						{
 							// Set this so plugin doesn't do any data changes
 							$content['dry-run'] = true;
+							importexport_helper_functions::$dry_run = true;
 							$this->message .= '<b>' . lang('Import aborted').":</b><br />\n";
 							$definition_obj->plugin_options = (array)$definition_obj->plugin_options + array('dry_run' => true);
 						}
@@ -105,6 +106,10 @@
 						{
 							echo $this->preview($plugin, $file, $definition_obj);
 						}
+						else
+						{
+							importexport_helper_functions::$dry_run = false;
+						}
 						$count = $plugin->import($file, $definition_obj);
 					}
 					else