diff --git a/src/plugins/plugin_xep_0054.py b/src/plugins/plugin_xep_0054.py
index 3d8e0fce..f5a4fd11 100755
--- a/src/plugins/plugin_xep_0054.py
+++ b/src/plugins/plugin_xep_0054.py
@@ -72,7 +72,7 @@ class XEP_0054():
             os.makedirs(self.avatar_path)
         host.bridge.addMethod("getCard", ".plugin", in_sign='ss', out_sign='s', method=self.getCard)
         host.bridge.addMethod("getAvatarFile", ".plugin", in_sign='s', out_sign='s', method=self.getAvatarFile)
-        host.bridge.addMethod("getCardCache", ".plugin", in_sign='s', out_sign='a{ss}', method=self.getCardCache)
+        host.bridge.addMethod("getCardCache", ".plugin", in_sign='ss', out_sign='a{ss}', method=self.getCardCache)
 
     def getHandler(self, profile):
         return XEP_0054_handler(self)