diff --git a/components/style_derive/to_css.rs b/components/style_derive/to_css.rs
index af729f91459..ac0bf05b900 100644
--- a/components/style_derive/to_css.rs
+++ b/components/style_derive/to_css.rs
@@ -63,7 +63,6 @@ fn derive_bitflags(input: &syn::DeriveInput, bitflags: &CssBitflagAttrs) -> Toke
     }
 
     body.append_all(quote! {
-        debug_assert!(has_any, "Shouldn't have parsed empty");
         Ok(())
     });