diff --git a/core/src/main/java/com/crschnick/pdx_unlimiter/core/savegame/Eu4SavegameParser.java b/core/src/main/java/com/crschnick/pdx_unlimiter/core/savegame/Eu4SavegameParser.java
index a7b007c3..be6a9397 100644
--- a/core/src/main/java/com/crschnick/pdx_unlimiter/core/savegame/Eu4SavegameParser.java
+++ b/core/src/main/java/com/crschnick/pdx_unlimiter/core/savegame/Eu4SavegameParser.java
@@ -32,7 +32,8 @@ public boolean isBinaryFormat(byte[] content) throws Exception {
             zipFile.closeEntry();
         }
         zipFile.close();
-        return false;
+        throw new SavegameParseException("Gamestate not found in savegame. " +
+                "This might be a very old savegame, which is not supported");
     }
 
     @Override