diff --git a/rdbms/OcciStmt.cpp b/rdbms/OcciStmt.cpp
index 222f7eb4e88ee17b8e8068fa43985caa679e82ab..e1a932a33f6e414e7d44d178b2ccedbe74e94d76 100644
--- a/rdbms/OcciStmt.cpp
+++ b/rdbms/OcciStmt.cpp
@@ -122,7 +122,7 @@ void OcciStmt::bindOptionalString(const std::string &paramName, const optional<s
     if(paramValue) {
       m_stmt->setString(paramIdx, paramValue.value());
     } else {
-      m_stmt->setString(paramIdx, nullptr);
+      m_stmt->setNull(paramIdx, oracle::occi::OCCISTRING);
     }
   } catch(exception::Exception &ex) {
     throw exception::Exception(std::string(__FUNCTION__) + " failed for SQL statement " + getSql() + ": " +