2 files changed, 9 insertions, 12 deletions
diff --git a/examples/lm3s6965/Cargo.lock b/examples/lm3s6965/Cargo.lock
index 848a06f..d7537dc 100644
--- a/examples/lm3s6965/Cargo.lock
+++ b/examples/lm3s6965/Cargo.lock
@@ -3,15 +3,6 @@
 version = 3
 
 [[package]]
-name = "atomic-polyfill"
-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cf2bce30dfe09ef0bfaef228b9d414faaf7e563035494d7fe092dba54b300f4"
-dependencies = [
- "critical-section",
-]
-
-[[package]]
 name = "bare-metal"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -309,6 +300,9 @@ name = "portable-atomic"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+dependencies = [
+ "critical-section",
+]
 
 [[package]]
 name = "proc-macro-error"
@@ -356,10 +350,10 @@ dependencies = [
 name = "rtic"
 version = "2.1.1"
 dependencies = [
- "atomic-polyfill",
  "bare-metal 1.0.0",
  "cortex-m",
  "critical-section",
+ "portable-atomic",
  "rtic-core",
  "rtic-macros",
 ]
@@ -393,10 +387,10 @@ dependencies = [
 name = "rtic-monotonics"
 version = "2.0.0"
 dependencies = [
- "atomic-polyfill",
  "cfg-if",
  "cortex-m",
  "fugit",
+ "portable-atomic",
  "rtic-time",
 ]
 
diff --git a/examples/lm3s6965/Cargo.toml b/examples/lm3s6965/Cargo.toml
index bfa4b29..5e2cc50 100644
--- a/examples/lm3s6965/Cargo.toml
+++ b/examples/lm3s6965/Cargo.toml
@@ -30,7 +30,10 @@ features = ["exit"]
 version = "0.6.0"
 
 [features]
-test-critical-section = ["rtic/test-critical-section"]
+test-critical-section = [
+  "rtic/test-critical-section",
+  "cortex-m/critical-section-single-core",
+]
 thumbv6-backend = ["rtic/thumbv6-backend"]
 thumbv7-backend = ["rtic/thumbv7-backend"]
 thumbv8base-backend = ["rtic/thumbv8base-backend"]