diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index 7e77dca66..20d3f569f 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -38,6 +38,7 @@
 (defvar org-src-lang-modes)
 (defvar org-babel-library-of-babel)
 (declare-function show-all "outline" ())
+(declare-function org-every "org" (pred seq))
 (declare-function org-reduce "org" (CL-FUNC CL-SEQ &rest CL-KEYS))
 (declare-function org-mark-ring-push "org" (&optional pos buffer))
 (declare-function tramp-compat-make-temp-file "tramp-compat"