diff --git a/MVMCoreUI/Atomic/Atoms/Buttons/ButtonGroup.swift b/MVMCoreUI/Atomic/Atoms/Buttons/ButtonGroup.swift
index ba9f8b56..f864e72f 100644
--- a/MVMCoreUI/Atomic/Atoms/Buttons/ButtonGroup.swift
+++ b/MVMCoreUI/Atomic/Atoms/Buttons/ButtonGroup.swift
@@ -43,6 +43,8 @@ import VDS
             childWidth = .value(childWidthValue)
         } else if let childWidthPercentage = viewModel.childWidthPercentage {
             childWidth = .percentage(childWidthPercentage)
+        } else {
+            childWidth = nil
         }
         
         // create / set the moleculeViews