diff --git a/plugin/business/ssl-policy/src/ssl_policy.cpp b/plugin/business/ssl-policy/src/ssl_policy.cpp
index fb9dde7..cc9fe0f 100644
--- a/plugin/business/ssl-policy/src/ssl_policy.cpp
+++ b/plugin/business/ssl-policy/src/ssl_policy.cpp
@@ -38,14 +38,14 @@ 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;
-	if(param==NULL)
+	if(param)
 	{
-		*to=NULL;
+		 __sync_add_and_fetch(&(param->ref_cnt), 1);
+		*to = param;
 	}
 	else
 	{
-		param->ref_cnt++;
-		*to = param;
+		*to=NULL;
 	}
 	return;
 }
@@ -171,8 +171,8 @@ void intercept_param_free_cb(int table_id, MAAT_PLUGIN_EX_DATA* ad, long argl, v
 	{
 		return;
 	}
-	param->ref_cnt--;
-	if(param->ref_cnt==0)
+	
+    if ((__sync_sub_and_fetch(&param->ref_cnt, 1) == 0))
 	{
 		TFE_LOG_INFO(enforcer->logger, "Del intercept policy %d", param->policy_id);\
 		free(param);