diff --git a/protocol-designer/src/organisms/DefineLiquidsModal/index.tsx b/protocol-designer/src/organisms/DefineLiquidsModal/index.tsx
index 3e2e90d8d94..33f98e7c412 100644
--- a/protocol-designer/src/organisms/DefineLiquidsModal/index.tsx
+++ b/protocol-designer/src/organisms/DefineLiquidsModal/index.tsx
@@ -143,8 +143,8 @@ export function DefineLiquidsModal(
     saveForm({
       name: values.name,
       displayColor: values.displayColor,
-      liquidClass: values.liquidClass ? values.liquidClass : null,
-      description: values.description ? values.description : null,
+      liquidClass: values.liquidClass !== '' ? values.liquidClass : null,
+      description: values.description !== '' ? values.description : null,
       serialize: values.serialize ?? false,
     })
   }