diff --git a/Dapper.SqlBuilder/SqlBuilder.cs b/Dapper.SqlBuilder/SqlBuilder.cs
index 57ef6780fe5377ba2928a80bdb502c1e5b9386d5..c827ddc77f0fe9dd259dc6de62946b084f1ee7d3 100644
--- a/Dapper.SqlBuilder/SqlBuilder.cs
+++ b/Dapper.SqlBuilder/SqlBuilder.cs
@@ -119,9 +119,9 @@ public Template AddTemplate(string sql, dynamic parameters = null)
         }
 
 #if CSHARP30
-        void AddClause(string name, string sql, object parameters, string joiner, string prefix, string postfix, bool isInclusive)
+        protected void AddClause(string name, string sql, object parameters, string joiner, string prefix, string postfix, bool isInclusive)
 #else
-        void AddClause(string name, string sql, object parameters, string joiner, string prefix = "", string postfix = "", bool isInclusive = false)
+        protected void AddClause(string name, string sql, object parameters, string joiner, string prefix = "", string postfix = "", bool isInclusive = false)
 #endif
         {
             Clauses clauses;