diff --git a/src/menu/playermenu.cpp b/src/menu/playermenu.cpp
index b25b86f1a6..b23a4d4222 100644
--- a/src/menu/playermenu.cpp
+++ b/src/menu/playermenu.cpp
@@ -162,6 +162,7 @@ void FPlayerNameBox::Drawer(bool selected)
 	{
 		size_t l = strlen(mEditName);
 		mEditName[l] = (gameinfo.gametype & (GAME_DoomStrifeChex)) ? '_' : '[';
+		mEditName[l+1] = 0;
 
 		screen->DrawText (SmallFont, CR_UNTRANSLATED, x + mFrameSize, mYpos, mEditName,
 			DTA_Clean, true, TAG_DONE);