diff --git a/core/src/ast/enums.rs b/core/src/ast/enums.rs
index 766833277..3169b6331 100644
--- a/core/src/ast/enums.rs
+++ b/core/src/ast/enums.rs
@@ -39,6 +39,9 @@ impl Enum {
                 .variants
                 .iter()
                 .map(|v| {
+                    if !matches!(v.fields, syn::Fields::Unit) {
+                        panic!("Enums cannot have fields, we only support C-like enums");
+                    }
                     let new_discriminant = v
                         .discriminant
                         .as_ref()