diff --git a/srcpkgs/ugdb/patches/atomicu64.patch b/srcpkgs/ugdb/patches/atomicu64.patch
new file mode 100644
index 00000000000..ec56043af57
--- /dev/null
+++ b/srcpkgs/ugdb/patches/atomicu64.patch
@@ -0,0 +1,28 @@
+commit db6e990cc46d69526beae930e0048f65d5510c34
+Author: q66 <daniel@octaforge.org>
+Date:   Tue Aug 10 18:52:51 2021 +0200
+
+    fix build on platforms without 64-bit atomics
+
+diff --git a/src/main.rs b/src/main.rs
+index ccfccab..fe2b52c 100644
+--- a/src/main.rs
++++ b/src/main.rs
+@@ -284,7 +284,7 @@ struct MpscTimer {
+     next_sender: Option<Sender<Event>>,
+     sender: Sender<Event>,
+     evt_fn: Box<dyn Fn() -> Event>,
+-    counter: std::sync::Arc<std::sync::atomic::AtomicU64>,
++    counter: std::sync::Arc<std::sync::atomic::AtomicUsize>,
+ }
+ 
+ impl MpscTimer {
+@@ -293,7 +293,7 @@ impl MpscTimer {
+             next_sender: Some(sender.clone()),
+             sender,
+             evt_fn,
+-            counter: std::sync::Arc::new(std::sync::atomic::AtomicU64::new(0)),
++            counter: std::sync::Arc::new(std::sync::atomic::AtomicUsize::new(0)),
+         }
+     }
+