1 files changed, 3 insertions, 3 deletions

diff --git a/lisp/env.el b/lisp/env.el
index e19f9f7f5da..1da48e05ea9 100644
--- a/lisp/env.el
+++ b/lisp/env.el
@@ -59,9 +59,9 @@ the entire variable name in braces.  Use `$$' to insert a single
 dollar sign."
   (let ((start 0))
     (while (string-match 
-            (rx (or (and "$" (submatch (1+ (in "a-zA-Z0-9_"))))
-                    (and "${" (submatch (minimal-match (0+ anything))) "}")
-                    "$$"))
+            (rx '(or (and "$" (submatch (1+ (in "a-zA-Z0-9_"))))
+                     (and "${" (submatch (minimal-match (0+ anything))) "}")
+                     "$$"))
             string start)
       (cond ((match-beginning 1)
              (let ((value (getenv (match-string 1 string))))