diff --git a/cara/apps/calculator/templates/report.html.j2 b/cara/apps/calculator/templates/report.html.j2
index 9628a92d..c21f81e4 100644
--- a/cara/apps/calculator/templates/report.html.j2
+++ b/cara/apps/calculator/templates/report.html.j2
@@ -18,7 +18,7 @@
 
 	<p class="data_title">Input data:</p>
 	<ul>
-		<li><p class="data_text">Room Volume: {{ room_volume }} m³</p></li>
+		<li><p class="data_text">Room Volume: {{ model.room.volume }} m³</p></li>
 	</ul>
 
 	<p class="data_title">Ventilation data:</p>