diff --git a/src_main/core/pistring.h b/src_main/core/pistring.h
index bcba33e3..61c03c2f 100755
--- a/src_main/core/pistring.h
+++ b/src_main/core/pistring.h
@@ -42,7 +42,7 @@ public:
 	PIString & operator +=(const PIChar & c) {push_back(c); return *this;}
 	PIString & operator +=(const char * str);
 	PIString & operator +=(const wchar_t * str);
-//	PIString & operator +=(const PIByteArray & ba) {appendFromChars((const char * )ba.data(), ba.size_s()); return *this;}
+	PIString & operator +=(const PIByteArray & ba) {appendFromChars((const char * )ba.data(), ba.size_s()); return *this;}
 	PIString & operator +=(const PIString & str);
 
 	//PIString(const char c) {*this += c;}
@@ -801,7 +801,7 @@ public:
 	PIStringList & operator <<(const PIString & str) {push_back(str); return *this;}
 	PIStringList & operator <<(const PIStringList & sl) {piForeachC (PIString & i, sl) push_back(i); return *this;}
 //	inline PIStringList & operator <<(const char c) {push_back(PIString(c)); return *this;}
-	PIStringList & operator <<(const char * str) {push_back(PIString(str)); return *this;}
+//	PIStringList & operator <<(const char * str) {push_back(PIString(str)); return *this;}
 //	PIStringList & operator <<(const int & num) {push_back(PIString::fromNumber(num)); return *this;}
 //	PIStringList & operator <<(const short & num) {push_back(PIString::fromNumber(num)); return *this;}
 //	PIStringList & operator <<(const long & num) {push_back(PIString::fromNumber(num)); return *this;}