diff --git a/plugin/business/ssl-policy/src/ssl_policy.cpp b/plugin/business/ssl-policy/src/ssl_policy.cpp
index 8653d5d..dbc5a6e 100644
--- a/plugin/business/ssl-policy/src/ssl_policy.cpp
+++ b/plugin/business/ssl-policy/src/ssl_policy.cpp
@@ -38,8 +38,15 @@ struct intercept_param
 void intercept_param_dup_cb(int table_id, MAAT_PLUGIN_EX_DATA* to, MAAT_PLUGIN_EX_DATA* from, long argl, void* argp)
 {
 	struct intercept_param* param= (struct intercept_param*) *from;
-	param->ref_cnt++;
-	*to = param;
+	if(param==NULL)
+	{
+		*to=NULL;
+	}
+	else
+	{
+		param->ref_cnt++;
+		*to = param;
+	}
 	return;
 }
 void intercept_param_new_cb(int table_id, const char* key, const char* table_line, MAAT_PLUGIN_EX_DATA* ad, long argl, void* argp)
@@ -140,6 +147,10 @@ void intercept_param_free_cb(int table_id, MAAT_PLUGIN_EX_DATA* ad, long argl, v
 {
 	struct ssl_policy_enforcer* enforcer=(struct ssl_policy_enforcer*)argp;
 	struct intercept_param* param= (struct intercept_param*) *ad;
+	if(param==NULL)
+	{
+		return;
+	}
 	param->ref_cnt--;
 	if(param->ref_cnt==0)
 	{