diff --git a/Source/multi.cpp b/Source/multi.cpp
index 113539136..543650360 100644
--- a/Source/multi.cpp
+++ b/Source/multi.cpp
@@ -690,7 +690,7 @@ BOOL NetInit(BOOL bSinglePlayer, BOOL *pfExitProgram)
 		ProgramData.versionid = 42;
 		ProgramData.maxplayers = MAX_PLRS;
 		ProgramData.initdata = &sgGameInitInfo;
-		ProgramData.initdatabytes = 8;
+		ProgramData.initdatabytes = sizeof(sgGameInitInfo);
 		ProgramData.optcategorybits = 15;
 		ProgramData.lcid = 1033; /* LANG_ENGLISH */
 		memset(&plrdata, 0, sizeof(plrdata));