diff --git a/src/libstrongswan/crypto/ac.c b/src/libstrongswan/crypto/ac.c
index fd58d7b5d..af7ebc092 100644
--- a/src/libstrongswan/crypto/ac.c
+++ b/src/libstrongswan/crypto/ac.c
@@ -245,6 +245,14 @@ static void ietfAttr_add(linked_list_t *list, ietfAttr_t *attr)
 	}
 }
 
+/**
+ * Create a linked list of ietfAttr_t objects from a string
+ */
+static void ietfAttr_create_from_string(linked_list_t *list, const char *msg)
+{
+
+}
+
 /**
  * Lists a linked list of ietfAttr_t objects
  */