diff --git a/src/clj_htmltopdf/core.clj b/src/clj_htmltopdf/core.clj
index 9eda54d..1255329 100644
--- a/src/clj_htmltopdf/core.clj
+++ b/src/clj_htmltopdf/core.clj
@@ -87,7 +87,7 @@
         base-uri (opt/->base-uri options)
         w3c-doc  (jsoup->w3c html-doc)]
     (opt/set-uri-resolver! builder options)
-    (obj/set-object-drawer-factory builder options)
+    (obj/set-object-drawer-factory! builder options)
     (.useSVGDrawer builder (BatikSVGDrawer.))
     (.withW3cDocument builder w3c-doc base-uri)
     (let [piped-in  (PipedInputStream.)
diff --git a/src/clj_htmltopdf/objects.clj b/src/clj_htmltopdf/objects.clj
index 86e6c89..3f5ddf4 100644
--- a/src/clj_htmltopdf/objects.clj
+++ b/src/clj_htmltopdf/objects.clj
@@ -41,7 +41,7 @@
           (if-let [f (get-in options [:objects :by-id element-id])]
             (->object-drawer-by-id f)))))))
 
-(defn set-object-drawer-factory
+(defn set-object-drawer-factory!
   [^PdfRendererBuilder builder options]
   (let [factory (->object-drawer-by-id-factory options)]
     (.useObjectDrawerFactory builder factory)))