diff --git a/examples/quad-test/main.cpp b/examples/quad-test/main.cpp
index b4c8bc995593b8636a48c33e8b5a7e6f60d9ea3b..16ecaa8925292995dbd3f5db9dd40f3221373354 100644
--- a/examples/quad-test/main.cpp
+++ b/examples/quad-test/main.cpp
@@ -46,6 +46,6 @@ int main(int argc, char* argv[]) {
 	binaryFile.close();
 	
 	tnlCSRMatrix <QuadDouble> quadMatrix("quad");
-	//quadMatrix = doubleMatrix;
+	quadMatrix = doubleMatrix;
 	return EXIT_SUCCESS;
 }
\ No newline at end of file