diff --git a/utils.rkt b/utils.rkt
index d258153..b0fbad8 100644
--- a/utils.rkt
+++ b/utils.rkt
@@ -224,8 +224,8 @@
 
 ;;; Reads a variable mapping from a string, such as the one which
 ;;; Org-mode produces from tables.
-(define (read-org-variable-mapping str)
-  (make-immutable-hash (unstringify-pairs (read-org-sexp str))))
+(define read-org-variable-mapping
+  (compose make-immutable-hash unstringify-pairs read-org-sexp))
 
 ;;; A synonym for read-org-variable-mapping.
 (define-syntax-rule (unorg str) (read-org-variable-mapping str))