diff --git a/muparser-2.2.5/include/muParserDef.h b/muparser-2.2.5/include/muParserDef.h
index d4938fcd7..0c7e023aa 100644
--- a/muparser-2.2.5/include/muParserDef.h
+++ b/muparser-2.2.5/include/muParserDef.h
@@ -312,8 +312,10 @@ class ParserError {
                 const string_type &sFormula = string_type(), int a_iPos = -1);
     ParserError(EErrorCodes a_iErrc, int a_iPos, const string_type &sTok);
     ParserError(const char_type *a_szMsg, int a_iPos = -1, const string_type &sTok = string_type());
-    ParserError(const ParserError &a_Obj);
-    ParserError &operator=(const ParserError &a_Obj);
+    ParserError(ParserError &&) = default;
+    ParserError &operator=(ParserError &&) = default;
+    ParserError(const ParserError &a_Obj) = default;
+    ParserError &operator=(const ParserError &a_Obj) = default;
     ~ParserError();
 
     void SetFormula(const string_type &a_strFormula);
@@ -327,8 +329,8 @@ class ParserError {
     string_type m_strMsg;      ///< The message string
     string_type m_strFormula;  ///< Formula string
     string_type m_strTok;      ///< Token related with the error
-    int m_iPos;                ///< Formula position related to the error
-    EErrorCodes m_iErrc;       ///< Error code
+    int m_iPos = -1;           ///< Formula position related to the error
+    EErrorCodes m_iErrc = ecUNDEFINED;  ///< Error code
 } MUPARSER_ATTR_WARN_UNUSED_RESULT;
 
 // OptionalError is used to optionally encapsulate an error.
diff --git a/muparser-2.2.5/src/muParserError.cpp b/muparser-2.2.5/src/muParserError.cpp
index 2ccad2399..099ebe825 100644
--- a/muparser-2.2.5/src/muParserError.cpp
+++ b/muparser-2.2.5/src/muParserError.cpp
@@ -116,16 +116,14 @@ string_type parser_error_for_code(EErrorCodes code) {
 //---------------------------------------------------------------------------
 
 /** \brief Default constructor. */
-ParserError::ParserError()
-    : m_strMsg(), m_strFormula(), m_strTok(), m_iPos(-1), m_iErrc(ecUNDEFINED) {}
+ParserError::ParserError() {}
 
 //------------------------------------------------------------------------------
 /** \brief This Constructor is used for internal exceptions only.
 
   It does not contain any information but the error code.
 */
-ParserError::ParserError(EErrorCodes a_iErrc)
-    : m_strMsg(), m_strFormula(), m_strTok(), m_iPos(-1), m_iErrc(a_iErrc) {
+ParserError::ParserError(EErrorCodes a_iErrc) : m_iErrc(a_iErrc) {
     m_strMsg = parser_error_for_code(m_iErrc);
     stringstream_type stream;
     stream << (int)m_iPos;
@@ -186,28 +184,6 @@ ParserError::ParserError(const char_type *szMsg, int iPos, const string_type &sT
     ReplaceSubString(m_strMsg, _T("$TOK$"), m_strTok);
 }
 
-//------------------------------------------------------------------------------
-/** \brief Copy constructor. */
-ParserError::ParserError(const ParserError &a_Obj)
-    : m_strMsg(a_Obj.m_strMsg),
-      m_strFormula(a_Obj.m_strFormula),
-      m_strTok(a_Obj.m_strTok),
-      m_iPos(a_Obj.m_iPos),
-      m_iErrc(a_Obj.m_iErrc) {}
-
-//------------------------------------------------------------------------------
-/** \brief Assignment operator. */
-ParserError &ParserError::operator=(const ParserError &a_Obj) {
-    if (this == &a_Obj) return *this;
-
-    m_strMsg = a_Obj.m_strMsg;
-    m_strFormula = a_Obj.m_strFormula;
-    m_strTok = a_Obj.m_strTok;
-    m_iPos = a_Obj.m_iPos;
-    m_iErrc = a_Obj.m_iErrc;
-    return *this;
-}
-
 //------------------------------------------------------------------------------
 ParserError::~ParserError() {}