diff --git a/Cargo.toml b/Cargo.toml
index d9c094e9..703680ee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cssparser"
-version = "0.23.9"
+version = "0.23.10"
 authors = [ "Simon Sapin <simon.sapin@exyr.org>" ]
 
 description = "Rust implementation of CSS Syntax Level 3"
diff --git a/procedural-masquerade/lib.rs b/procedural-masquerade/lib.rs
index 86e841a0..22cdeeb1 100644
--- a/procedural-masquerade/lib.rs
+++ b/procedural-masquerade/lib.rs
@@ -177,8 +177,15 @@ macro_rules! define_proc_macros {
                 fn wrapped($input: &str) -> String {
                     $body
                 }
+
+                // syn uses a huge amount of stack in debug mode.
                 let derive_input_string = derive_input.to_string();
-                wrapped($crate::_extract_input(&derive_input_string)).parse().unwrap()
+                let handle =
+                    ::std::thread::Builder::new().stack_size(128 * 1024 * 1024).spawn(move || {
+                        wrapped($crate::_extract_input(&derive_input_string))
+                    }).unwrap();
+
+                handle.join().unwrap().parse().unwrap()
             }
         )+
     }