diff --git a/collects/compiler/sig.ss b/collects/compiler/sig.ss
index 66a5202f14..6892abb895 100644
--- a/collects/compiler/sig.ss
+++ b/collects/compiler/sig.ss
@@ -1,6 +1,7 @@
 
 (begin-elaboration-time
  (require-library "compiles.ss")
+ (require-library "inflates.ss")
  (require-library "makes.ss" "make")
  (require-library "collections.ss" "make"))