diff --git a/render.c b/render.c
index 913f463..6f22d61 100644
--- a/render.c
+++ b/render.c
@@ -600,8 +600,14 @@ render(ZathuraRenderRequest* request, ZathuraRenderer* renderer)
   /* create cairo surface */
   unsigned int page_width  = 0;
   unsigned int page_height = 0;
-  const double real_scale = page_calc_height_width(page, &page_height,
-      &page_width, false);
+
+  zathura_document_t* document = zathura_page_get_document(page);
+  double height = zathura_page_get_height(page);
+  double width = zathura_page_get_width(page);
+
+  const double real_scale = page_calc_height_width(document, height, width,
+                                                   &page_height, &page_width, false);
+
 
   cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
       page_width, page_height);
@@ -705,7 +711,9 @@ render_all(zathura_t* zathura)
     zathura_page_t* page = zathura_document_get_page(zathura->document,
         page_id);
     unsigned int page_height = 0, page_width = 0;
-    page_calc_height_width(page, &page_height, &page_width, true);
+    double height = zathura_page_get_height(page);
+    double width = zathura_page_get_width(page);
+    page_calc_height_width(zathura->document, height, width, &page_height, &page_width, true);
 
     GtkWidget* widget = zathura_page_get_widget(zathura, page);
     gtk_widget_set_size_request(widget, page_width, page_height);
diff --git a/utils.c b/utils.c
index e92c8f3..363245e 100644
--- a/utils.c
+++ b/utils.c
@@ -241,17 +241,11 @@ error_ret:
 }
 
 double
-page_calc_height_width(zathura_page_t* page, unsigned int* page_height, unsigned int* page_width, bool rotate)
+page_calc_height_width(zathura_document_t* document, double height, double width,
+                       unsigned int* page_height, unsigned int* page_width, bool rotate)
 {
-  g_return_val_if_fail(page != NULL && page_height != NULL && page_width != NULL, 0.0);
+  g_return_val_if_fail(document != NULL && page_height != NULL && page_width != NULL, 0.0);
 
-  zathura_document_t* document = zathura_page_get_document(page);
-  if (document == NULL) {
-    return 0.0;
-  }
-
-  double height = zathura_page_get_height(page);
-  double width  = zathura_page_get_width(page);
   double scale  = zathura_document_get_scale(document);
   double real_scale;
 
diff --git a/utils.h b/utils.h
index d42baf5..8276ede 100644
--- a/utils.h
+++ b/utils.h
@@ -96,7 +96,8 @@ zathura_rectangle_t recalc_rectangle(zathura_page_t* page, zathura_rectangle_t r
  * @return real scale after rounding
  */
 double
-page_calc_height_width(zathura_page_t* page, unsigned int* page_height, unsigned int* page_width, bool rotate);
+page_calc_height_width(zathura_document_t* document, double height, double width,
+                       unsigned int* page_height, unsigned int* page_width, bool rotate);
 
 /**
  * Compute the size of the entire document to be displayed (in pixels), taking
@@ -138,7 +139,7 @@ void document_draw_search_results(zathura_t* zathura, bool value);
  *
  * @param zathura The zathura instance
  * @param markup Enable markup
- * @return Version string 
+ * @return Version string
  */
 char* zathura_get_version_string(zathura_t* zathura, bool markup);
 
diff --git a/zathura.c b/zathura.c
index 8ba2e80..56cbe02 100644
--- a/zathura.c
+++ b/zathura.c
@@ -745,7 +745,10 @@ document_open(zathura_t* zathura, const char* path, const char* password,
     /* set widget size */
     unsigned int page_height = 0;
     unsigned int page_width  = 0;
-    page_calc_height_width(page, &page_height, &page_width, true);
+
+    double height = zathura_page_get_height(page);
+    double width = zathura_page_get_width(page);
+    page_calc_height_width(zathura->document, height, width, &page_height, &page_width, true);
 
     gtk_widget_set_size_request(page_widget, page_width, page_height);