diff --git a/common/TracyProtocol.hpp b/common/TracyProtocol.hpp
index e89cc8a2..4612a9cf 100644
--- a/common/TracyProtocol.hpp
+++ b/common/TracyProtocol.hpp
@@ -28,6 +28,8 @@ enum ServerQuery : uint8_t
 
 enum { WelcomeMessageProgramNameSize = 64 };
 
+#pragma pack( 1 )
+
 struct WelcomeMessage
 {
     double timerMul;
@@ -42,6 +44,8 @@ struct WelcomeMessage
 
 enum { WelcomeMessageSize = sizeof( WelcomeMessage ) };
 
+#pragma pack()
+
 }
 
 #endif