diff --git a/main.cpp b/main.cpp
index c335b22a..9eb4b570 100644
--- a/main.cpp
+++ b/main.cpp
@@ -131,7 +131,7 @@ void swap(std::string & x, std::string & y) {std::string t = x; x = y; y = t;}
 void swap2(std::string & x, std::string & y) {std::string t{std::move(x)}; x = std::move(y); y = std::move(t);}
 void swap(A & x, A & y) {A t = x; x = y; y = t;}
 void swap2(A & x, A & y) {A t{std::move(x)}; x = std::move(y); y = std::move(t);}
-void swap(PIObject & x, PIObject & y) {A t = x; x = y; y = t;}
+//void swap(PIObject & x, PIObject & y) {A t = x; x = y; y = t;}
 //void swap2(PIObject & x, PIObject & y) {A t(std::move(x)); x = std::move(y); y = std::move(t);}
 
 int main(int argc, char * argv[]) {