diff --git a/cara/apps/calculator/templates/calculator.form.html.j2 b/cara/apps/calculator/templates/calculator.form.html.j2
index d41ae4d6..0e865235 100644
--- a/cara/apps/calculator/templates/calculator.form.html.j2
+++ b/cara/apps/calculator/templates/calculator.form.html.j2
@@ -72,9 +72,9 @@
     
     HEPA filtration:
     <input type="radio" id="hepa_no" name="hepa_option" value=0 onclick="require_fields(this)" checked="checked">
-    <label for="hepa_filter">No</label>
+    <label for="hepa_no">No</label>
     <input type="radio" id="hepa_yes" name="hepa_option" value=1 onclick="require_fields(this)">
-    <label for="hepa_filter">Yes</label>
+    <label for="hepa_yes">Yes</label>
     <input type="number" step=0.01 id="hepa_amount" name="hepa_amount" placeholder="(m³ / hour)">
     <hr width="80%">