diff --git a/src/main/frontend/extensions/pdf/assets.cljs b/src/main/frontend/extensions/pdf/assets.cljs
index 9613e9e3a..888cfc92d 100644
--- a/src/main/frontend/extensions/pdf/assets.cljs
+++ b/src/main/frontend/extensions/pdf/assets.cljs
@@ -261,11 +261,15 @@
 (defn fix-local-asset-filename
   [filename]
   (when-not (string/blank? filename)
-    (let [local-asset? (re-find #"[0-9]{13}_\d$" filename)]
-      (-> filename
-          (subs 0 (- (count filename) (if local-asset? 15 0)))
-          (string/replace #"^hls__" "")
-          (string/replace "_" " ")))))
+    (let [local-asset? (re-find #"[0-9]{13}_\d$" filename)
+          hls? (and local-asset? (re-find #"^hls__" filename))]
+      (if (or local-asset? hls?)
+        (-> filename
+            (subs 0 (- (count filename) 15))
+            (string/replace #"^hls__" "")
+            (string/replace "_" " ")
+            (string/trimr))
+        filename))))
 
 (rum/defc human-hls-filename-display
   [title]
diff --git a/src/test/frontend/extensions/pdf/assets_test.cljs b/src/test/frontend/extensions/pdf/assets_test.cljs
new file mode 100644
index 000000000..3c39e4387
--- /dev/null
+++ b/src/test/frontend/extensions/pdf/assets_test.cljs
@@ -0,0 +1,16 @@
+(ns frontend.extensions.pdf.assets-test
+  (:require [clojure.test :as test :refer [are deftest testing]]
+            [clojure.string :as str]
+            [frontend.extensions.pdf.assets :as assets]))
+
+(deftest fix-local-asset-filename
+  (testing "matched filenames"
+    (are [x y] (= y (assets/fix-local-asset-filename x))
+      "2015_Book_Intertwingled_1659920114630_0" "2015 Book Intertwingled"
+      "hls__2015_Book_Intertwingled_1659920114630_0" "2015 Book Intertwingled"))
+  (testing "non matched filenames"
+    (are [x y] (= y (assets/fix-local-asset-filename x))
+      "foo" "foo"
+      "foo_bar" "foo_bar"
+      "foo__bar" "foo__bar"
+      "foo_bar.pdf" "foo_bar.pdf")))