diff --git a/collects/mzlib/private/runtime-path-table.rkt b/collects/mzlib/private/runtime-path-table.rkt
index 5eced361fa..faf9d2f9a4 100644
--- a/collects/mzlib/private/runtime-path-table.rkt
+++ b/collects/mzlib/private/runtime-path-table.rkt
@@ -1,3 +1,5 @@
 (module runtime-path-table mzscheme
   (provide table)
-  (define table #f))
+  (define table #f)
+  ;; So table definition is not inlined across modules:
+  (set! table #f))