diff --git a/examples/rust-gcoap/Cargo.lock b/examples/rust-gcoap/Cargo.lock
index 0cf8a67238..b994dcef61 100644
Binary files a/examples/rust-gcoap/Cargo.lock and b/examples/rust-gcoap/Cargo.lock differ
diff --git a/examples/rust-gcoap/Cargo.toml b/examples/rust-gcoap/Cargo.toml
index c461e5e75b..99d15c69d8 100644
--- a/examples/rust-gcoap/Cargo.toml
+++ b/examples/rust-gcoap/Cargo.toml
@@ -19,7 +19,8 @@ codegen-units = 1
 opt-level = "s"
 
 [dependencies]
-riot-wrappers = { version = "^0.9.0", features = [ "set_panic_handler", "panic_handler_format", "with_coap_message", "with_coap_handler" ] }
+riot-wrappers = { version = "^0.9.0", features = [ "set_panic_handler", "panic_handler_format", "with_coap_message", "with_coap_handler", "provide_critical_section_1_0" ] }
+portable-atomic = { version = "1", features = [ "critical-section" ] }
 
 coap-message-demos = { git = "https://gitlab.com/chrysn/coap-message-demos/", default-features = false }
 coap-handler-implementations = "0.5"
@@ -31,3 +32,9 @@ riot-coap-handler-demos = { git = "https://gitlab.com/etonomy/riot-module-exampl
 # RIOTBASE.
 rust_riotmodules = { path = "../../sys/rust_riotmodules/" }
 static_cell = "2.1.0"
+
+[patch.crates-io]
+# from https://github.com/seanmonstar/try-lock/pull/11, necessary for those
+# platforms without atomics (which also needs provide_critical_section_1_0 from
+# riot-wrappers, and portable-atomic/critical-section to bridge the gap)
+try-lock = { git = "https://github.com/seanmonstar/try-lock", rev = "45c39685b56a4dba1b71bdbbbe5f731c3c77dc50" }