diff --git a/scheme/rts-packages.scm b/scheme/rts-packages.scm
index 6266b58..1aabf29 100644
--- a/scheme/rts-packages.scm
+++ b/scheme/rts-packages.scm
@@ -75,7 +75,8 @@
 	architecture
 	primitives ports code-vectors bitwise
 	define-record-types ascii
-	threads locks
+	threads locks 
+	threads-internal  ; JMG for scsh
 	methods         ; &disclose :input-port :output-port
 	interrupts      ; {en|dis}able-interrupts!
 	number-i/o      ; number->string for debugging