diff --git a/PacketReader.cpp b/PacketReader.cpp
--- a/PacketReader.cpp
+++ b/PacketReader.cpp
@@ -3,6 +3,7 @@
  * $URL: http://localhost/svn/cpp/qMonitor/trunk/PacketReader.cpp $
  */
 
+#include <cstdio>
 #include <PacketReader.h>
 
 PacketReader::PacketReader (int tm)