diff --git a/src/gi.cpp b/src/gi.cpp
index ecc301624..a6efab358 100644
--- a/src/gi.cpp
+++ b/src/gi.cpp
@@ -414,6 +414,8 @@ void FMapInfoParser::ParseGameInfo()
 
 		else
 		{
+			DPrintf(DMSG_ERROR, "Unknown GAMEINFO key \"%s\" found in %s:%i\n", nextKey.GetChars(), sc.ScriptName.GetChars(), sc.Line);
+
 			// ignore unkown keys.
 			sc.UnGet();
 			SkipToNext();