diff --git a/collects/compiler/sig.ss b/collects/compiler/sig.ss
index 7b6ebfa471..8b258781aa 100644
--- a/collects/compiler/sig.ss
+++ b/collects/compiler/sig.ss
@@ -1,7 +1,7 @@
 
-(reference-library "compiles.ss")
-(reference-library "makes.ss" "make")
-(reference-library "collections.ss" "make")
+(require-library "compiles.ss")
+(require-library "makes.ss" "make")
+(require-library "collections.ss" "make")
 
 ;; Compiler options
 (define-signature compiler:option^