diff --git a/services/aprsis/aprsis.go b/services/aprsis/aprsis.go
index abf090c..693cb8b 100644
--- a/services/aprsis/aprsis.go
+++ b/services/aprsis/aprsis.go
@@ -138,7 +138,7 @@ func UploadRaw(s string) {
 		Connect(opts)
 	}
 
-	err := conn.PrintfLine(s)
+	err := conn.PrintfLine("%s", s)
 
 	if err != nil {
 		log.Error(err)