diff --git a/lisp/ox-publish.el b/lisp/ox-publish.el
index 753176b93..b146e51ec 100644
--- a/lisp/ox-publish.el
+++ b/lisp/ox-publish.el
@@ -435,8 +435,8 @@ This splices all the components into the list."
   (let* ((base-dir (file-name-as-directory
 		    (org-publish-property :base-directory project)))
 	 (extension (or (org-publish-property :base-extension project) "org"))
-	 (match (and (not (eq extension 'any))
-		     (concat "^[^\\.].*\\.\\(" extension "\\)$")))
+	 (match (if (eq extension 'any) ""
+		  (format "^[^\\.].*\\.\\(%s\\)$" extension)))
 	 (base-files
 	  (cl-remove-if #'file-directory-p
 			(if (org-publish-property :recursive project)
diff --git a/testing/lisp/test-ox-publish.el b/testing/lisp/test-ox-publish.el
index 3553807a8..a51190578 100644
--- a/testing/lisp/test-ox-publish.el
+++ b/testing/lisp/test-ox-publish.el
@@ -455,6 +455,14 @@ Unless set otherwise in PROPERTIES, `:base-directory' is set to
 	  (org-publish-project-alist
 	   `(("p" :base-directory ,base :base-extension any))))
      (org-publish-get-project-from-filename file)))
+  ;; Pathological case: Handle both :extension any and :recursive t.
+  (should
+   (let* ((base (expand-file-name "examples/pub/" org-test-dir))
+	  (file (expand-file-name "sub/c.org" base))
+	  (org-publish-project-alist
+	   `(("p" :base-directory ,base :recursive t :base-extension any))))
+     (org-publish-get-base-files (org-publish-get-project-from-filename file))))
+
   ;; Check :exclude property.
   (should-not
    (let* ((base (expand-file-name "examples/pub/" org-test-dir))