diff --git a/ldvspec/lofardata/static/lofardata/styling/dias.css b/ldvspec/lofardata/static/lofardata/styling/dias.css
index 372b8d4dca7e7ddb8c71bd1bddf24642ff37ef6e..1eff72969e33b6167a90b13cb68fe8b9cbcfd09d 100644
--- a/ldvspec/lofardata/static/lofardata/styling/dias.css
+++ b/ldvspec/lofardata/static/lofardata/styling/dias.css
@@ -3657,7 +3657,7 @@ input.section-toggle-invert:checked ~ .section-wrapper {
     height: 3rem;
 }
 
-.custom---checkbox[type=checkbox]:checked {
+.custom--checkbox[type=checkbox]:checked {
     width: auto;
     position: relative;
     display: inline-block;