diff --git a/callbacks.c b/callbacks.c
index 820a053..74c2ef1 100644
--- a/callbacks.c
+++ b/callbacks.c
@@ -64,7 +64,7 @@ cb_view_vadjustment_value_changed(GtkAdjustment *adjustment, gpointer data)
         || ( (begin <= lower) && (end >= lower) && (end <= upper) ) /* end of the page is in viewport */
         || ( (begin >= lower) && (end >= upper) && (begin <= upper) ) /* begin of the page is in viewport */
       ) {
-      render_page(Zathura.Sync.render_thread, Zathura.document->pages[page_id]);
+        render_page(Zathura.Sync.render_thread, Zathura.document->pages[page_id]);
     }
   }
 }
diff --git a/render.c b/render.c
index eed5d7d..884d623 100644
--- a/render.c
+++ b/render.c
@@ -1,11 +1,11 @@
 #include "render.h"
 #include "zathura.h"
 
-void* search(void* data);
+void* render_job(void* data);
 bool render(zathura_page_t* page);
 
 void*
-search(void* data)
+render_job(void* data)
 {
   render_thread_t* render_thread = (render_thread_t*) data;
 
@@ -45,7 +45,7 @@ render_init(void)
     goto error_free;
   }
 
-  render_thread->thread = g_thread_create(search, render_thread, TRUE, NULL);
+  render_thread->thread = g_thread_create(render_job, render_thread, TRUE, NULL);
 
   if(!render_thread->thread) {
     goto error_free;
@@ -78,7 +78,7 @@ render_free(render_thread_t* render_thread)
 bool
 render_page(render_thread_t* render_thread, zathura_page_t* page)
 {
-  if(!render_thread || !page || !render_thread->list) {
+  if(!render_thread || !page || !render_thread->list || page->rendered) {
     return false;
   }
 
diff --git a/utils.c b/utils.c
index 91e9096..a5fafd8 100644
--- a/utils.c
+++ b/utils.c
@@ -157,7 +157,7 @@ page_blank(unsigned int width, unsigned int height)
   gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
   gtk_widget_show(image);
 
-  free(buffer);
+  /*free(buffer);*/
   g_object_unref(pixbuf);
 
   return image;