diff --git a/collects/mzlib/awk.ss b/collects/mzlib/awk.ss
index 7c770c3..58d200f 100644
--- a/collects/mzlib/awk.ss
+++ b/collects/mzlib/awk.ss
@@ -7,3 +7,7 @@
    (require-relative-library "awkr.ss")))
 
 (define-macro awk awk)
+
+(define-values/invoke-unit (match:start match:end match:substring regexp-exec)
+  (require-relative-library "awkr.ss"))
+