diff --git a/collects/planet/syntax.rkt b/collects/planet/syntax.rkt
index 43b62fdfbb..6768d538ff 100644
--- a/collects/planet/syntax.rkt
+++ b/collects/planet/syntax.rkt
@@ -43,7 +43,7 @@
   (match (syntax-source-planet-package stx)
     [(list owner name major minor)
      (string->symbol
-      (format "~a/~a:~a:~a~a"
+      (format "~a/~a:~a:=~a~a"
               owner
               (regexp-replace "\\.plt$" name "")
               major