diff --git a/embassy-sync/Cargo.toml b/embassy-sync/Cargo.toml
index 85673026c..aaf6fab1d 100644
--- a/embassy-sync/Cargo.toml
+++ b/embassy-sync/Cargo.toml
@@ -20,7 +20,7 @@ src_base_git = "https://github.com/embassy-rs/embassy/blob/$COMMIT/embassy-sync/
 target = "thumbv7em-none-eabi"
 
 [features]
-std = []
+std = ["critical-section/std"]
 turbowakers = []
 
 [dependencies]