Diff of /libpp/op_header.cpp [af7e83] .. [a4c754] Maximize Restore

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--- a/libpp/op_header.cpp
+++ b/libpp/op_header.cpp
@@ -10,6 +10,7 @@
  * @Modifications Daniel Hansel
  */
 
+#include <cstring>
 #include <iostream>
 #include <cstdlib>
 #include <iomanip>