diff --git a/embassy-sync/Cargo.toml b/embassy-sync/Cargo.toml
index 0d14bba5..14ab1d00 100644
--- a/embassy-sync/Cargo.toml
+++ b/embassy-sync/Cargo.toml
@@ -11,6 +11,7 @@ target = "thumbv7em-none-eabi"
 
 [features]
 nightly = ["embedded-io/async"]
+std = []
 
 [dependencies]
 defmt = { version = "0.3", optional = true }