diff --git a/proxmox-api-macro/src/api.rs b/proxmox-api-macro/src/api.rs
index ef3e6102..5f0acb6b 100644
--- a/proxmox-api-macro/src/api.rs
+++ b/proxmox-api-macro/src/api.rs
@@ -109,6 +109,15 @@ impl Schema {
         }
     }
 
+    fn empty_object(span: Span) -> Self {
+        Self {
+            span,
+            description: None,
+            item: SchemaItem::Object(SchemaObject::new()),
+            properties: Vec::new(),
+        }
+    }
+
     fn to_typed_schema(&self, ts: &mut TokenStream) -> Result<(), Error> {
         self.item.to_schema(
             ts,
@@ -331,6 +340,12 @@ pub struct SchemaObject {
 }
 
 impl SchemaObject {
+    pub fn new() -> Self {
+        Self {
+            properties: Vec::new(),
+        }
+    }
+
     fn try_extract_from(obj: &mut JSONObject) -> Result<Self, syn::Error> {
         Ok(Self {
             properties: obj
diff --git a/proxmox-api-macro/src/api/structs.rs b/proxmox-api-macro/src/api/structs.rs
index 254ca93b..c8926dc8 100644
--- a/proxmox-api-macro/src/api/structs.rs
+++ b/proxmox-api-macro/src/api/structs.rs
@@ -3,7 +3,7 @@ use std::convert::{TryFrom, TryInto};
 
 use failure::Error;
 
-use proc_macro2::{Ident, TokenStream};
+use proc_macro2::{Ident, Span, TokenStream};
 use quote::quote_spanned;
 
 use super::Schema;
@@ -12,7 +12,11 @@ use crate::serde;
 use crate::util::{self, FieldName, JSONObject};
 
 pub fn handle_struct(attribs: JSONObject, mut stru: syn::ItemStruct) -> Result<TokenStream, Error> {
-    let mut schema: Schema = attribs.try_into()?;
+    let mut schema: Schema = if attribs.is_empty() {
+        Schema::empty_object(Span::call_site())
+    } else {
+        attribs.try_into()?
+    };
 
     if schema.description.is_none() {
         let (doc_comment, doc_span) = util::get_doc_comments(&stru.attrs)?;
diff --git a/proxmox-api-macro/src/util.rs b/proxmox-api-macro/src/util.rs
index a73f297e..0c88ce91 100644
--- a/proxmox-api-macro/src/util.rs
+++ b/proxmox-api-macro/src/util.rs
@@ -298,6 +298,10 @@ pub struct JSONObject {
 }
 
 impl JSONObject {
+    pub fn is_empty(&self) -> bool {
+        self.elements.is_empty()
+    }
+
     fn parse_elements(input: ParseStream) -> syn::Result<HashMap<FieldName, JSONValue>> {
         let map_elems: Punctuated<JSONMapEntry, Token![,]> =
             input.parse_terminated(JSONMapEntry::parse)?;
diff --git a/proxmox-api-macro/tests/types.rs b/proxmox-api-macro/tests/types.rs
index cf3fd9e9..c6c83cce 100644
--- a/proxmox-api-macro/tests/types.rs
+++ b/proxmox-api-macro/tests/types.rs
@@ -16,9 +16,7 @@ use serde_json::Value;
 //#[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct OkString(String);
 
-#[api(
-    properties: {}
-)]
+#[api]
 /// A Foo.
 pub struct Foo {
     /// A test string.