diff --git a/src/PacketParser.cpp b/src/PacketParser.cpp
index 283e180..a85904e 100644
--- a/src/PacketParser.cpp
+++ b/src/PacketParser.cpp
@@ -1,4 +1,5 @@
 #include "PacketParser.h"
+#include <cstddef>
 
 PacketParser::PacketParser()
 {