diff --git a/csgo/demo_parser.go b/csgo/demo_parser.go
index e94ec89..a4d454b 100644
--- a/csgo/demo_parser.go
+++ b/csgo/demo_parser.go
@@ -247,7 +247,9 @@ func (p *DemoParser) parseWorker() {
 		spays := make([]*Sprays, 0)
 
 		cfg := demoinfocs.DefaultParserConfig
-		cfg.NetMessageDecryptionKey = demo.DecryptionKey
+		if len(demo.DecryptionKey) >= 16 {
+			cfg.NetMessageDecryptionKey = demo.DecryptionKey
+		}
 		demoParser := demoinfocs.NewParserWithConfig(fDemo, cfg)
 
 		// onChatMessage