diff --git a/src/g_game.c b/src/g_game.c
index 137992e4d..ceab3a465 100644
--- a/src/g_game.c
+++ b/src/g_game.c
@@ -3358,6 +3358,11 @@ void G_LoadGameData(void)
 	// Allow saving of gamedata beyond this point
 	gamedataloaded = true;
 
+	if (M_CheckParm("-gamedata") && M_IsNextParm())
+	{
+		strlcpy(gamedatafilename, M_GetNextParm(), sizeof gamedatafilename);
+	}
+
 	if (M_CheckParm("-resetdata"))
 		return; // Don't load (essentially, reset).