diff --git a/doerg/src/net/deertopia/doerg/render.clj b/doerg/src/net/deertopia/doerg/render.clj
index b989bc2..e415548 100644
--- a/doerg/src/net/deertopia/doerg/render.clj
+++ b/doerg/src/net/deertopia/doerg/render.clj
@@ -143,6 +143,16 @@
          #(element/of-keyword-type? % "LATEX_HEADER")
          (sp/view :value)])))
 
+(defn timeout-snippet-promises [snippet-promises fut]
+  ;; Time out after eight seconds. With all the LaTeX and IPC, there
+  ;; are so many opportunities for things to go wrong </3.
+  (let [fut-res (deref fut (* 10 1000) ::timed-out)]
+    (if (= fut-res ::timed-out)
+      (do (future-cancel fut)
+          (doseq [[_snippet p] snippet-promises]
+            (deliver p ::timed-out)))
+      fut-res)))
+
 (defn render-tex-snippets
   "Traverse doc, adorning each LaTeX node with a promise resolving to,
   optimistically, Hiccup-rendered SVG or MathML code."
@@ -156,16 +166,10 @@
                       (let [p (promise)]
                         (swap! snippet-promises #(conj % [(:value node) p]))
                         (assoc node ::rendered p)))))
-        fut (-> #(tex/render-snippets @snippet-promises)
+        sp @snippet-promises
+        fut (-> #(tex/render-snippets sp)
                 bound-fn* future-call)]
-    ;; Time out after eight seconds. With all the LaTeX and IPC, there
-    ;; are so many opportunities for things to go wrong </3.
-    (let [fut-res (deref fut (* 10 1000) ::timed-out)]
-      (if (= fut-res ::timed-out)
-        (do (future-cancel fut)
-            (doseq [[_snippet p] @snippet-promises]
-              (deliver p ::timed-out)))
-        fut-res))
+    (timeout-snippet-promises sp fut)
     r))
 
 (comment