diff --git a/packages/grafana-ui/src/components/Forms/RadioButtonGroup/RadioButton.tsx b/packages/grafana-ui/src/components/Forms/RadioButtonGroup/RadioButton.tsx
index 33acd1859a8..624e93e20e6 100644
--- a/packages/grafana-ui/src/components/Forms/RadioButtonGroup/RadioButton.tsx
+++ b/packages/grafana-ui/src/components/Forms/RadioButtonGroup/RadioButton.tsx
@@ -80,7 +80,7 @@ const getRadioButtonStyles = stylesFactory((theme: GrafanaTheme, size: RadioButt
       background: ${bg};
       cursor: pointer;
       z-index: 1;
-      flex: ${fullWidth ? `1 0 0` : 0};
+      flex: ${fullWidth ? `1 0 0` : 'none'};
       text-align: center;
       user-select: none;