diff --git a/i18n_string/i18n_string.inc b/i18n_string/i18n_string.inc
index c99d4cc..1805f4b 100644
--- a/i18n_string/i18n_string.inc
+++ b/i18n_string/i18n_string.inc
@@ -600,7 +600,7 @@ class i18n_string_textgroup_default {
 
     // Reset the persistent caches.
     foreach (array('translations', 'strings', 'cache_multiple') as $caches_type) {
-      cache_clear('i18n_string_cache:' . $caches_type . ':' . $this->textgroup, 'cache', TRUE);
+      cache_clear_all('i18n_string_cache:' . $caches_type . ':' . $this->textgroup, 'cache', TRUE);
     }
   }